[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
Shahar Or, this bug report is being closed due to your last comment regarding this being fixed with a BIOS update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find. ** Changed in: linux (Ubuntu) Status: New = Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Changed in: linux Status: Confirmed = Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report at bugzilla.kernel.org [1]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug. If you are comfortable with opening a bug upstream, It would be great if you can report back the upstream bug number in this bug report. That will allow us to link this bug to the upstream report. [1] https://wiki.ubuntu.com/Bugs/Upstream/kernel -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
Thanks to Gigabyte for a timely response! ** Description changed: + # SOLUTION ### + + This can be solved by flashing the latest BIOS from the vendor, version F4c. + This can be obtained here: + http://www.gigabyte.com/products/product-page.aspx?pid=3817dl=1#bios + By the way, once extracted, the BIOS can be flashed using flashrom, which is available in the Ubuntu repositories. + + ## + # WORKAROUND # To work around this issue, I change the governor of all the cpu's to 'performance'. You can put the following lines in a script and run it as root after boot. This will make all cores run at maximum rate, causing more power consumption. Note that I have four cpu's. You might have 6 or 8 if this occurs with other FX series processors. #!/bin/bash echo performance /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor ## Dear Ones, When frequency scaling is activated (more details below) the system has short freezes, short lags, short time-outs. They vary in length and can be as long as about 1 second. Here's a video(1). I've received help from the fantastic folks at the xorg-driver-ati mailing list. Here's the thread(2). It doesn't matter whether it is Unity or Unity 2D. Windows 7 runs smooth, without the stuttering / framedrop problem in my LCD's Maximum resolution of 1280x1024. Testing with a dedicated PCI Express GPU (Radeon R300 if I remember correctly), the stuttering persisted. Here's some testing with different governors: performance: smoothness goodness ondemand: the stuttering as demonstrated in the video conservative: stuttering reduced to seemingly about 10% compared to ondemand powersave: stuttering increase seemingly to about five times more than with ondemand When using ondemand, raising minimum frequencies results in less stuttering. Raising the minimum frequency of all four cores to the second step, 1.7GHz, helps a lot and and raising it to 2.5GHz results no stuttering. This is under the limited strain of dragging windows around in 1280x1024 in compiz, Ubuntu 11.10. I've also tested 2012-02-06 image of precise. Still occurs. As per Joseph's request on comment #5, I've also tested with upstream kernel from Mainline Kernels Archive on Oneiric. Here's the basic info: shahar@shahar-desktop:~$ uname -a Linux shahar-desktop 3.3.0-030300rc4-generic #201202181935 SMP Sun Feb 19 00:36:30 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux shahar@shahar-desktop:~$ lsb_release -a LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch Distributor ID: Ubuntu Description: Ubuntu 11.10 Release: 11.10 Codename: oneiric As per Joseph's request on comment #6, I've tested Gnome Classic (No Effects). It didn't happen when my CPU was an AMD Sempron 140. As soon as I switched to the AMD FX-4100 CPU this started. As per Gigabyte's instructions(3), in order to have support for this CPU, I upgraded the BIOS from the F2 version to the F3 version before replacing the CPU (flashrom FTW!) If it is necessary, I can still put in the old Sempron 140 CPU for testing. More stuff I tried since replacing the CPU: I have played with BIOS settings - trying different configurations. I also replaced to a new, more adequate PSU. I also tried different RAM sticks and different amounts of them (1, 2 and 4 sticks). Thanks and blessings, Shahar Links: 1. http://bit.ly/xDOZF3 (on Google Docs) 2. http://lists.x.org/archives/xorg-driver-ati/2012-February/03.html 3. http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3817 ProblemType: BugDistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7.1 ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell] CompositorRunning: None Date: Mon Feb 6 23:38:39 2012 DistUpgraded: Log time: 2011-10-16 02:49:10.693391 DistroCodename: oneiric DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) Subsystem: Giga-byte Technology Device [1458:d000]InstallationMedia: Ubuntu 10.10
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
Closing the X task; this certainly appears to be a kernel issue rather than just X. ** Changed in: xserver-xorg-video-ati (Ubuntu) Status: New = Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Description changed: # WORKAROUND # To work around this issue, I change the governor of all the cpu's to 'performance'. You can put the following lines in a script and run it as root after boot. This will make all cores run at maximum rate, causing more power consumption. Note that I have four cpu's. You might have 6 or 8 if this occurs with other FX series processors. #!/bin/bash - echo performance /sys/devices/system/cpu/cu0/cpufreq/scaling_governor + echo performance /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor ## Dear Ones, When frequency scaling is activated (more details below) the system has short freezes, short lags, short time-outs. They vary in length and can be as long as about 1 second. Here's a video(1). I've received help from the fantastic folks at the xorg-driver-ati mailing list. Here's the thread(2). It doesn't matter whether it is Unity or Unity 2D. Windows 7 runs smooth, without the stuttering / framedrop problem in my LCD's Maximum resolution of 1280x1024. Testing with a dedicated PCI Express GPU (Radeon R300 if I remember correctly), the stuttering persisted. Here's some testing with different governors: performance: smoothness goodness ondemand: the stuttering as demonstrated in the video conservative: stuttering reduced to seemingly about 10% compared to ondemand powersave: stuttering increase seemingly to about five times more than with ondemand When using ondemand, raising minimum frequencies results in less stuttering. Raising the minimum frequency of all four cores to the second step, 1.7GHz, helps a lot and and raising it to 2.5GHz results no stuttering. This is under the limited strain of dragging windows around in 1280x1024 in compiz, Ubuntu 11.10. I've also tested 2012-02-06 image of precise. Still occurs. As per Joseph's request on comment #5, I've also tested with upstream kernel from Mainline Kernels Archive on Oneiric. Here's the basic info: shahar@shahar-desktop:~$ uname -a Linux shahar-desktop 3.3.0-030300rc4-generic #201202181935 SMP Sun Feb 19 00:36:30 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux shahar@shahar-desktop:~$ lsb_release -a LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch Distributor ID: Ubuntu Description: Ubuntu 11.10 Release: 11.10 Codename: oneiric As per Joseph's request on comment #6, I've tested Gnome Classic (No Effects). It didn't happen when my CPU was an AMD Sempron 140. As soon as I switched to the AMD FX-4100 CPU this started. As per Gigabyte's instructions(3), in order to have support for this CPU, I upgraded the BIOS from the F2 version to the F3 version before replacing the CPU (flashrom FTW!) If it is necessary, I can still put in the old Sempron 140 CPU for testing. More stuff I tried since replacing the CPU: I have played with BIOS settings - trying different configurations. I also replaced to a new, more adequate PSU. I also tried different RAM sticks and different amounts of them (1, 2 and 4 sticks). Thanks and blessings, Shahar Links: 1. http://bit.ly/xDOZF3 (on Google Docs) 2. http://lists.x.org/archives/xorg-driver-ati/2012-February/03.html 3. http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3817 ProblemType: BugDistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7.1 ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell] CompositorRunning: None Date: Mon Feb 6 23:38:39 2012 DistUpgraded: Log time: 2011-10-16 02:49:10.693391 DistroCodename: oneiric DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) Subsystem: Giga-byte Technology Device [1458:d000]InstallationMedia: Ubuntu 10.10 Maverick Meerkat - Release amd64 (20101007) MachineType: Gigabyte Technology Co., Ltd. GA-880GMA-USB3 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=57641e34-8b71-4e2e-9324-ff40ca1bc82a ro quiet splash vt.handoff=7SourcePackage: xorg UpgradeStatus: Upgraded to oneiric on 2011-10-16 (113 days
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Changed in: xserver-xorg-video-ati (Ubuntu) Status: Incomplete = New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Package changed: xorg (Ubuntu) = xserver-xorg-video-ati (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Tags added: freeze -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
Dear Ones, What does the freeze tag mean, please? I couldn't find it in: https://wiki.ubuntu.com/Bugs/Tags Thanks and Blessings, Shahar -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
Dear Bryce, Joseph, It looks quite similar with all of the types of sessions. I've tried both Gnome Classic (No Effects), as you requested and Gnome Classic. I'm not sure what we're meant to test here, though. I'll try with the latest upstream kernel as you requested, Joseph. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Tags removed: needs-upstream-testing ** Tags added: kernel-bug-exists-upstrem -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Description changed: # WORKAROUND # To work around this issue, I change the governor of all the cpu's to 'performance'. You can make this change at boot by adding the following lines to /etc/rc.local . This will make all cores run at maximum rate, causing more power consumption. Note that I have four cpu's. You might have 6 or 8 if this occurs with other FX series processors. echo performance /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor ## Dear Ones, When frequency scaling is activated (more details below) the system has short freezes, short lags, short time-outs. They vary in length and can be as long as about 1 second. Here's a video(1). I've received help from the fantastic folks at the xorg-driver-ati mailing list. Here's the thread(2). It doesn't matter whether it is Unity or Unity 2D. Windows 7 runs smooth, without the stuttering / framedrop problem in my LCD's Maximum resolution of 1280x1024. Testing with a dedicated PCI Express GPU (Radeon R300 if I remember correctly), the stuttering persisted. Here's some testing with different governors: performance: smoothness goodness ondemand: the stuttering as demonstrated in the video conservative: stuttering reduced to seemingly about 10% compared to ondemand powersave: stuttering increase seemingly to about five times more than with ondemand When using ondemand, raising minimum frequencies results in less stuttering. Raising the minimum frequency of all four cores to the second step, 1.7GHz, helps a lot and and raising it to 2.5GHz results no stuttering. This is under the limited strain of dragging windows around in 1280x1024 in compiz, Ubuntu 11.10. I've also tested 2012-02-06 image of precise. Still occurs. + + As per Joseph's request on comment #5, I've also tested with upstream + kernel from Mainline Kernels Archive on Oneiric. Here's the basic info: + + shahar@shahar-desktop:~$ uname -a + Linux shahar-desktop 3.3.0-030300rc4-generic #201202181935 SMP Sun Feb 19 00:36:30 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux + shahar@shahar-desktop:~$ lsb_release -a + LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch + Distributor ID: Ubuntu + Description: Ubuntu 11.10 + Release: 11.10 + Codename: oneiric + + As per Joseph's request on comment #6, I've tested Gnome Classic (No + Effects). It didn't happen when my CPU was an AMD Sempron 140. As soon as I switched to the AMD FX-4100 CPU this started. As per Gigabyte's instructions(3), in order to have support for this CPU, I upgraded the BIOS from the F2 version to the F3 version before replacing the CPU (flashrom FTW!) If it is necessary, I can still put in the old Sempron 140 CPU for testing. More stuff I tried since replacing the CPU: I have played with BIOS settings - trying different configurations. I also replaced to a new, more adequate PSU. I also tried different RAM sticks and different amounts of them (1, 2 and 4 sticks). Thanks and blessings, Shahar Links: 1. http://bit.ly/xDOZF3 (on Google Docs) 2. http://lists.x.org/archives/xorg-driver-ati/2012-February/03.html 3. http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3817 ProblemType: BugDistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7.1 ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell] CompositorRunning: None Date: Mon Feb 6 23:38:39 2012 DistUpgraded: Log time: 2011-10-16 02:49:10.693391 DistroCodename: oneiric DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) Subsystem: Giga-byte Technology Device [1458:d000]InstallationMedia: Ubuntu 10.10 Maverick Meerkat - Release amd64 (20101007) MachineType: Gigabyte Technology Co., Ltd. GA-880GMA-USB3 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=57641e34-8b71-4e2e-9324-ff40ca1bc82a ro quiet splash vt.handoff=7SourcePackage: xorg UpgradeStatus: Upgraded to oneiric on 2011-10-16 (113 days ago) dmi.bios.date: 10/20/2011 dmi.bios.vendor: Award Software
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Description changed: # WORKAROUND # - To work around this issue, I change the governor of all the cpu's to 'performance'. You can make this change at boot by adding the following lines to /etc/rc.local . This will make all cores run at maximum rate, causing more power consumption. Note that I have four cpu's. You might have 6 or 8 if this occurs with other FX series processors. + To work around this issue, I change the governor of all the cpu's to 'performance'. You can put the following lines in a script and run it as root after boot. This will make all cores run at maximum rate, causing more power consumption. Note that I have four cpu's. You might have 6 or 8 if this occurs with other FX series processors. - echo performance /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor + #!/bin/bash + echo performance /sys/devices/system/cpu/cu0/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor ## Dear Ones, When frequency scaling is activated (more details below) the system has short freezes, short lags, short time-outs. They vary in length and can be as long as about 1 second. Here's a video(1). I've received help from the fantastic folks at the xorg-driver-ati mailing list. Here's the thread(2). It doesn't matter whether it is Unity or Unity 2D. Windows 7 runs smooth, without the stuttering / framedrop problem in my LCD's Maximum resolution of 1280x1024. Testing with a dedicated PCI Express GPU (Radeon R300 if I remember correctly), the stuttering persisted. Here's some testing with different governors: performance: smoothness goodness ondemand: the stuttering as demonstrated in the video conservative: stuttering reduced to seemingly about 10% compared to ondemand powersave: stuttering increase seemingly to about five times more than with ondemand When using ondemand, raising minimum frequencies results in less stuttering. Raising the minimum frequency of all four cores to the second step, 1.7GHz, helps a lot and and raising it to 2.5GHz results no stuttering. This is under the limited strain of dragging windows around in 1280x1024 in compiz, Ubuntu 11.10. I've also tested 2012-02-06 image of precise. Still occurs. As per Joseph's request on comment #5, I've also tested with upstream kernel from Mainline Kernels Archive on Oneiric. Here's the basic info: shahar@shahar-desktop:~$ uname -a Linux shahar-desktop 3.3.0-030300rc4-generic #201202181935 SMP Sun Feb 19 00:36:30 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux shahar@shahar-desktop:~$ lsb_release -a LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch Distributor ID: Ubuntu Description: Ubuntu 11.10 Release: 11.10 Codename: oneiric As per Joseph's request on comment #6, I've tested Gnome Classic (No Effects). It didn't happen when my CPU was an AMD Sempron 140. As soon as I switched to the AMD FX-4100 CPU this started. As per Gigabyte's instructions(3), in order to have support for this CPU, I upgraded the BIOS from the F2 version to the F3 version before replacing the CPU (flashrom FTW!) If it is necessary, I can still put in the old Sempron 140 CPU for testing. More stuff I tried since replacing the CPU: I have played with BIOS settings - trying different configurations. I also replaced to a new, more adequate PSU. I also tried different RAM sticks and different amounts of them (1, 2 and 4 sticks). Thanks and blessings, Shahar Links: 1. http://bit.ly/xDOZF3 (on Google Docs) 2. http://lists.x.org/archives/xorg-driver-ati/2012-February/03.html 3. http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3817 ProblemType: BugDistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7.1 ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell] CompositorRunning: None Date: Mon Feb 6 23:38:39 2012 DistUpgraded: Log time: 2011-10-16 02:49:10.693391 DistroCodename: oneiric DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) Subsystem: Giga-byte Technology Device
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Summary changed: - Display lags / framedrops / stutters GPU: RS880 CPU: FX-4100 + Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU ** Tags added: precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Attachment added: glxinfo https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/927918/+attachment/2766968/+files/glxinfo -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Attachment added: sysprof https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/927918/+attachment/2766969/+files/sysprof -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Description changed: Dear Ones, - This situation is permanent. It happens in both Ubuntu and Ubuntu 2D. + When frequency scaling is activated (more details below) the system has + short freezes, short lags, short time-outs. They vary in length and + can be as long as about 1 second. Here's a video(1). + + It doesn't matter whether it is Unity or Unity 2D. + + Windows 7 runs smooth, without the stuttering / framedrop problem in my + LCD's Maximum resolution of 1280x1024. + + Testing with a dedicated PCI Express GPU (Radeon R300 if I remember + correctly), the stuttering persisted. + + Here's some testing with different governors: + performance: smoothness goodness + ondemand: the stuttering as demonstrated in the video + conservative: stuttering reduced to seemingly about 10% compared to ondemand + powersave: stuttering increase seemingly to about five times more than with ondemand + + When using ondemand, raising minimum frequencies results in less + stuttering. Raising the minimum frequency of all four cores to the + second step, 1.7GHz, helps a lot and and raising it to 2.5GHz results no + stuttering. This is under the limited strain of dragging windows around + in 1280x1024 in compiz, Ubuntu 11.10. I've also tested 2012-02-06 image of precise. Still occurs. - For example, when I drag windows around, there are framedrops. Is the - term framedrops clear? The movement is jumpy. As if frames are skipped - in the rendering of the display. So it seems that the window that I'm - moving is jumping instead o smooth movement. + It didn't happen when my CPU was an AMD Sempron 140. As soon as I + switched to the AMD FX-4100 CPU this started. - The stuttering seems to be generated by CPU activity, I've noticed. + As per Gigabyte's instructions(2), in order to have support for this + CPU, I upgraded the BIOS from the F2 version to the F3 version + before replacing the CPU (flashrom FTW!) If it is necessary, I can still + put in the old Sempron 140 CPU for testing. - Funny thing is that it didn't happen when my CPU was an AMD Sempron 140. - As soon as I switched to the AMD FX-4100 CPU this started. - - I don't know if this is X.org, radeon or maybe linux... I apologize and - I will let you decide. + More stuff I tried since replacing the CPU: I have played with BIOS + settings - trying different configurations. I also replaced to a new, + more adequate PSU. I also tried different RAM sticks and different + amounts of them (1, 2 and 4 sticks). Thanks and blessings, + Shahar - ProblemType: Bug - DistroRelease: Ubuntu 11.10 + Links: + 1. http://bit.ly/xDOZF3 (on Google Docs) + 2. http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3817 + + ProblemType: BugDistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7.1 ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 .tmp.unity.support.test.0: - + ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell] CompositorRunning: None Date: Mon Feb 6 23:38:39 2012 DistUpgraded: Log time: 2011-10-16 02:49:10.693391 DistroCodename: oneiric DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: - ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) -Subsystem: Giga-byte Technology Device [1458:d000] - InstallationMedia: Ubuntu 10.10 Maverick Meerkat - Release amd64 (20101007) + ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) + Subsystem: Giga-byte Technology Device [1458:d000]InstallationMedia: Ubuntu 10.10 Maverick Meerkat - Release amd64 (20101007) MachineType: Gigabyte Technology Co., Ltd. GA-880GMA-USB3 - ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=57641e34-8b71-4e2e-9324-ff40ca1bc82a ro quiet splash vt.handoff=7 - SourcePackage: xorg + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=57641e34-8b71-4e2e-9324-ff40ca1bc82a ro quiet splash vt.handoff=7SourcePackage: xorg UpgradeStatus: Upgraded to oneiric on 2011-10-16 (113 days ago) dmi.bios.date: 10/20/2011 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F3 dmi.board.name: GA-880GMA-USB3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF3:bd10/20/2011:svnGigabyteTechnologyCo.,Ltd.:pnGA-880GMA-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-880GMA-USB3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-880GMA-USB3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
Since this is cpureq related. ** Description changed: Dear Ones, When frequency scaling is activated (more details below) the system has short freezes, short lags, short time-outs. They vary in length and can be as long as about 1 second. Here's a video(1). + + I've received help from the fantastic folks at the xorg-driver-ati + mailing list. Here's the thread(2). It doesn't matter whether it is Unity or Unity 2D. Windows 7 runs smooth, without the stuttering / framedrop problem in my LCD's Maximum resolution of 1280x1024. Testing with a dedicated PCI Express GPU (Radeon R300 if I remember correctly), the stuttering persisted. Here's some testing with different governors: performance: smoothness goodness ondemand: the stuttering as demonstrated in the video conservative: stuttering reduced to seemingly about 10% compared to ondemand powersave: stuttering increase seemingly to about five times more than with ondemand When using ondemand, raising minimum frequencies results in less stuttering. Raising the minimum frequency of all four cores to the second step, 1.7GHz, helps a lot and and raising it to 2.5GHz results no stuttering. This is under the limited strain of dragging windows around in 1280x1024 in compiz, Ubuntu 11.10. I've also tested 2012-02-06 image of precise. Still occurs. It didn't happen when my CPU was an AMD Sempron 140. As soon as I switched to the AMD FX-4100 CPU this started. - As per Gigabyte's instructions(2), in order to have support for this + As per Gigabyte's instructions(3), in order to have support for this CPU, I upgraded the BIOS from the F2 version to the F3 version before replacing the CPU (flashrom FTW!) If it is necessary, I can still put in the old Sempron 140 CPU for testing. More stuff I tried since replacing the CPU: I have played with BIOS settings - trying different configurations. I also replaced to a new, more adequate PSU. I also tried different RAM sticks and different amounts of them (1, 2 and 4 sticks). Thanks and blessings, Shahar Links: 1. http://bit.ly/xDOZF3 (on Google Docs) - 2. http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3817 + 2. http://lists.x.org/archives/xorg-driver-ati/2012-February/03.html + 3. http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3817 ProblemType: BugDistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7.1 ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell] CompositorRunning: None Date: Mon Feb 6 23:38:39 2012 DistUpgraded: Log time: 2011-10-16 02:49:10.693391 DistroCodename: oneiric DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) Subsystem: Giga-byte Technology Device [1458:d000]InstallationMedia: Ubuntu 10.10 Maverick Meerkat - Release amd64 (20101007) MachineType: Gigabyte Technology Co., Ltd. GA-880GMA-USB3 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=57641e34-8b71-4e2e-9324-ff40ca1bc82a ro quiet splash vt.handoff=7SourcePackage: xorg UpgradeStatus: Upgraded to oneiric on 2011-10-16 (113 days ago) dmi.bios.date: 10/20/2011 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F3 dmi.board.name: GA-880GMA-USB3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF3:bd10/20/2011:svnGigabyteTechnologyCo.,Ltd.:pnGA-880GMA-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-880GMA-USB3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-880GMA-USB3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6 version.ia32-libs: ia32-libs 20090808ubuntu26 version.libdrm2: libdrm2 2.4.26-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3 version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1 **
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Description changed: + # WORKAROUND # + To work around this issue, I change the governor of all the cpu's to 'performance'. You can make this change at boot by adding the following lines to /etc/rc.local . Note that I have four cpu's. You might have 6 or 8 if this occurs with other FX series processors. + + echo performance /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor + echo performance /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor + echo performance /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor + echo performance /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor + ## + Dear Ones, When frequency scaling is activated (more details below) the system has short freezes, short lags, short time-outs. They vary in length and can be as long as about 1 second. Here's a video(1). I've received help from the fantastic folks at the xorg-driver-ati mailing list. Here's the thread(2). It doesn't matter whether it is Unity or Unity 2D. Windows 7 runs smooth, without the stuttering / framedrop problem in my LCD's Maximum resolution of 1280x1024. Testing with a dedicated PCI Express GPU (Radeon R300 if I remember correctly), the stuttering persisted. Here's some testing with different governors: performance: smoothness goodness ondemand: the stuttering as demonstrated in the video conservative: stuttering reduced to seemingly about 10% compared to ondemand powersave: stuttering increase seemingly to about five times more than with ondemand When using ondemand, raising minimum frequencies results in less stuttering. Raising the minimum frequency of all four cores to the second step, 1.7GHz, helps a lot and and raising it to 2.5GHz results no stuttering. This is under the limited strain of dragging windows around in 1280x1024 in compiz, Ubuntu 11.10. I've also tested 2012-02-06 image of precise. Still occurs. It didn't happen when my CPU was an AMD Sempron 140. As soon as I switched to the AMD FX-4100 CPU this started. As per Gigabyte's instructions(3), in order to have support for this CPU, I upgraded the BIOS from the F2 version to the F3 version before replacing the CPU (flashrom FTW!) If it is necessary, I can still put in the old Sempron 140 CPU for testing. More stuff I tried since replacing the CPU: I have played with BIOS settings - trying different configurations. I also replaced to a new, more adequate PSU. I also tried different RAM sticks and different amounts of them (1, 2 and 4 sticks). Thanks and blessings, Shahar Links: 1. http://bit.ly/xDOZF3 (on Google Docs) 2. http://lists.x.org/archives/xorg-driver-ati/2012-February/03.html 3. http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3817 ProblemType: BugDistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7.1 ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell] CompositorRunning: None Date: Mon Feb 6 23:38:39 2012 DistUpgraded: Log time: 2011-10-16 02:49:10.693391 DistroCodename: oneiric DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) Subsystem: Giga-byte Technology Device [1458:d000]InstallationMedia: Ubuntu 10.10 Maverick Meerkat - Release amd64 (20101007) MachineType: Gigabyte Technology Co., Ltd. GA-880GMA-USB3 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=57641e34-8b71-4e2e-9324-ff40ca1bc82a ro quiet splash vt.handoff=7SourcePackage: xorg UpgradeStatus: Upgraded to oneiric on 2011-10-16 (113 days ago) dmi.bios.date: 10/20/2011 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F3 dmi.board.name: GA-880GMA-USB3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF3:bd10/20/2011:svnGigabyteTechnologyCo.,Ltd.:pnGA-880GMA-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-880GMA-USB3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-880GMA-USB3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6 version.ia32-libs: ia32-libs 20090808ubuntu26 version.libdrm2: libdrm2 2.4.26-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx:
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Bug watch added: Linux Kernel Bug Tracker #42807 http://bugzilla.kernel.org/show_bug.cgi?id=42807 ** Also affects: linux via http://bugzilla.kernel.org/show_bug.cgi?id=42807 Importance: Unknown Status: Unknown ** Description changed: # WORKAROUND # - To work around this issue, I change the governor of all the cpu's to 'performance'. You can make this change at boot by adding the following lines to /etc/rc.local . Note that I have four cpu's. You might have 6 or 8 if this occurs with other FX series processors. + To work around this issue, I change the governor of all the cpu's to 'performance'. You can make this change at boot by adding the following lines to /etc/rc.local . This will make all cores run at maximum rate, causing more power consumption. Note that I have four cpu's. You might have 6 or 8 if this occurs with other FX series processors. echo performance /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor echo performance /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor ## Dear Ones, When frequency scaling is activated (more details below) the system has short freezes, short lags, short time-outs. They vary in length and can be as long as about 1 second. Here's a video(1). I've received help from the fantastic folks at the xorg-driver-ati mailing list. Here's the thread(2). It doesn't matter whether it is Unity or Unity 2D. Windows 7 runs smooth, without the stuttering / framedrop problem in my LCD's Maximum resolution of 1280x1024. Testing with a dedicated PCI Express GPU (Radeon R300 if I remember correctly), the stuttering persisted. Here's some testing with different governors: performance: smoothness goodness ondemand: the stuttering as demonstrated in the video conservative: stuttering reduced to seemingly about 10% compared to ondemand powersave: stuttering increase seemingly to about five times more than with ondemand When using ondemand, raising minimum frequencies results in less stuttering. Raising the minimum frequency of all four cores to the second step, 1.7GHz, helps a lot and and raising it to 2.5GHz results no stuttering. This is under the limited strain of dragging windows around in 1280x1024 in compiz, Ubuntu 11.10. I've also tested 2012-02-06 image of precise. Still occurs. It didn't happen when my CPU was an AMD Sempron 140. As soon as I switched to the AMD FX-4100 CPU this started. As per Gigabyte's instructions(3), in order to have support for this CPU, I upgraded the BIOS from the F2 version to the F3 version before replacing the CPU (flashrom FTW!) If it is necessary, I can still put in the old Sempron 140 CPU for testing. More stuff I tried since replacing the CPU: I have played with BIOS settings - trying different configurations. I also replaced to a new, more adequate PSU. I also tried different RAM sticks and different amounts of them (1, 2 and 4 sticks). Thanks and blessings, Shahar Links: 1. http://bit.ly/xDOZF3 (on Google Docs) 2. http://lists.x.org/archives/xorg-driver-ati/2012-February/03.html 3. http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3817 ProblemType: BugDistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7.1 ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell] CompositorRunning: None Date: Mon Feb 6 23:38:39 2012 DistUpgraded: Log time: 2011-10-16 02:49:10.693391 DistroCodename: oneiric DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) Subsystem: Giga-byte Technology Device [1458:d000]InstallationMedia: Ubuntu 10.10 Maverick Meerkat - Release amd64 (20101007) MachineType: Gigabyte Technology Co., Ltd. GA-880GMA-USB3 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=57641e34-8b71-4e2e-9324-ff40ca1bc82a ro quiet splash vt.handoff=7SourcePackage: xorg UpgradeStatus: Upgraded to oneiric on 2011-10-16 (113 days ago) dmi.bios.date: 10/20/2011 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F3 dmi.board.name: GA-880GMA-USB3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias:
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
Would it be possible for you to test the latest upstream kernel? It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.3 kernel[1] (Not a kernel in the daily directory). Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag(Only that one tag, please leave the other tags). This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. If this bug is fixed by the mainline kernel, please add the following tag 'kernel-fixed-upstream-KERNEL-VERSION'. For example, if kernel version 3.3-rc4 fixed the issue, the tag would be: 'kernel-fixed- upstream-v3.3-rc4'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Once testing of the upstream kernel is complete, please mark this bug as Confirmed. Thanks in advance. [1] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.3-rc4-precise/ ** Package changed: linux-meta (Ubuntu) = linux (Ubuntu) ** Changed in: linux (Ubuntu) Importance: Undecided = Medium ** Tags added: needs-upstream-testing -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
** Changed in: linux Status: Unknown = Confirmed ** Changed in: linux Importance: Unknown = Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 927918] Re: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU
I agree with Alex the symptoms in your video feels like software rendering. However your glxinfo and unity test info show that you definitely have hardware rendering. And that would only really affect Unity, not Unity 2D. Would you mind also testing Gnome Classic (No Effects)? Install gnome- panel and then select it from the login screen. ** Changed in: xorg (Ubuntu) Status: New = Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/927918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
