Public bug reported:
Background:
Symptoms are 50-120% CPU usage when scrolling (especially Firefox),
dragging around a window, resizing windows, basically any 2D graphics
rendering on the desktop. This happens both in fglrx and the open source
radeon driver. I started my debugging process by changing various
settings, restarting, running "top" in a terminal, launching a Nautilus
window, and quickly dragging it around with the mouse in circles while
watching the CPU usage rise to around 50%. Resizing the window makes it
jump to 100%+. Xorg and compiz are the culprits, with the CPU usage
being split around 50/50 between them.
Reproducing the issue:
After a lot of searching I found some tips in the Arch Wiki article for
the open source radeon driver, and I put together the following
xorg.conf:
Section "Module"
Load "dri2"
Load "glamoregl"
EndSection
Section "Device"
Identifier "Radeon 6670"
Driver "radeon"
Option "MigrationHeuristic" "greedy"
Option "AccelMethod" "glamor"
EndSection
After applying these settings, launching Nautilus and dragging it around
only resulted in about 4% CPU usage each for xorg and compiz. Then,
resizing the window (click and hold a side, and just keep moving the
mouse left and right) made Xorg jump to 70% and compiz 50%. After that,
when I start dragging the window around, CPU usage is back to around
what it was originally: About 25% for compiz and 15% for Xorg. This
exact behaviour happens after each reboot: The CPU usage is initially
low when dragging the window around, but resizing it somehow messes
things up and it never goes back to normal after that.
I'm using a Radeon 6670 right now. I'll be receiving an R7 260X in about
a week or so, so I won't be able to test with the exact same hardware,
but I'm expecting at least similar behaviour since I also swapped in an
R7 250 and was having the same issues.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Fri Jul 4 03:52:17 2014
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DkmsStatus:
virtualbox, 4.3.10, 3.13.0-29-generic, x86_64: installed
virtualbox, 4.3.10, 3.13.0-30-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Turks XT [Radeon HD 6670/7670]
[1002:6758] (prog-if 00 [VGA controller])
Subsystem: Gigabyte Technology Co., Ltd Device [1458:2545]
InstallationDate: Installed on 2014-06-06 (27 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Gigabyte Technology Co., Ltd. GA-970A-D3
ProcEnviron:
LANGUAGE=en_CA:en
TERM=xterm
PATH=(custom, no user)
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic
root=UUID=d254b01f-2bf2-4b57-acdc-c796786f4c4c ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/03/2013
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F12
dmi.board.name: GA-970A-D3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias:
dmi:bvnAwardSoftwareInternational,Inc.:bvrF12:bd09/03/2013:svnGigabyteTechnologyCo.,Ltd.:pnGA-970A-D3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-970A-D3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-970A-D3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.11+14.04.20140423-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Fri Jul 4 03:38:17 2014
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.15.1-0ubuntu2
xserver.video_driver: radeon
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 trusty ubuntu
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1337749
Title:
High CPU usage after resizing a window
Status in “xorg” package in Ubuntu:
New
Bug description:
Background:
Symptoms are 50-120% CPU usage when scrolling (especially Firefox),
dragging around a window, resizing windows, basically any 2D graphics
rendering on the desktop. This happens both in fglrx and the open
source radeon driver. I started my debugging process by changing
various settings, restarting, running "top" in a terminal, launching a
Nautilus window, and quickly dragging it around with the mouse in
circles while watching the CPU usage rise to around 50%. Resizing the
window makes it jump to 100%+. Xorg and compiz are the culprits, with
the CPU usage being split around 50/50 between them.
Reproducing the issue:
After a lot of searching I found some tips in the Arch Wiki article
for the open source radeon driver, and I put together the following
xorg.conf:
Section "Module"
Load "dri2"
Load "glamoregl"
EndSection
Section "Device"
Identifier "Radeon 6670"
Driver "radeon"
Option "MigrationHeuristic" "greedy"
Option "AccelMethod" "glamor"
EndSection
After applying these settings, launching Nautilus and dragging it
around only resulted in about 4% CPU usage each for xorg and compiz.
Then, resizing the window (click and hold a side, and just keep moving
the mouse left and right) made Xorg jump to 70% and compiz 50%. After
that, when I start dragging the window around, CPU usage is back to
around what it was originally: About 25% for compiz and 15% for Xorg.
This exact behaviour happens after each reboot: The CPU usage is
initially low when dragging the window around, but resizing it somehow
messes things up and it never goes back to normal after that.
I'm using a Radeon 6670 right now. I'll be receiving an R7 260X in
about a week or so, so I won't be able to test with the exact same
hardware, but I'm expecting at least similar behaviour since I also
swapped in an R7 250 and was having the same issues.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Fri Jul 4 03:52:17 2014
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DkmsStatus:
virtualbox, 4.3.10, 3.13.0-29-generic, x86_64: installed
virtualbox, 4.3.10, 3.13.0-30-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Turks XT [Radeon HD 6670/7670]
[1002:6758] (prog-if 00 [VGA controller])
Subsystem: Gigabyte Technology Co., Ltd Device [1458:2545]
InstallationDate: Installed on 2014-06-06 (27 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Gigabyte Technology Co., Ltd. GA-970A-D3
ProcEnviron:
LANGUAGE=en_CA:en
TERM=xterm
PATH=(custom, no user)
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic
root=UUID=d254b01f-2bf2-4b57-acdc-c796786f4c4c ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/03/2013
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F12
dmi.board.name: GA-970A-D3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias:
dmi:bvnAwardSoftwareInternational,Inc.:bvrF12:bd09/03/2013:svnGigabyteTechnologyCo.,Ltd.:pnGA-970A-D3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-970A-D3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-970A-D3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.11+14.04.20140423-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.10-1ubuntu2
xserver.bootTime: Fri Jul 4 03:38:17 2014
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.15.1-0ubuntu2
xserver.video_driver: radeon
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