[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Hello, I think I am experiencing the same issue so I am not opening a new bug report. Below is the description I also posted a question about: I have upgraded to Kubuntu 20.04 from 19.10. Session went ok but after rebooting I noticed one or two times where my screen (external monitor connected via display port to my laptop) went on and off for 1-2 seconds. After the recent update to Kernel 5.4.0-40 and then to 5.4.0-42 these on and off instances are more frequent. System and sound etc works (doesn't hang) , only the screen goes black and on again, which is very annoying. This does not happen with HDMI cable connected, but instead there are some minor screen glitches, not very often though. I did not have any of those with 19.10...my system is details are shown below:. See especially the last part ie dmesg | grep -i i915. Note that reverting to kernel 5.4.0-39 things go back to normal. Operating System: Kubuntu 20.04 KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.68.0 Qt Version: 5.12.8 Kernel Version: 5.4.0-40-generic OS Type: 64-bit Processors: 8 × Intel® Core™ i5-10210U CPU @ 1.60GHz Memory: 15,5 GiB of RAM lspci 00:00.0 Host bridge: Intel Corporation Device 9b61 (rev 0c) 00:02.0 VGA compatible controller: Intel Corporation UHD Graphics (rev 02) 00:12.0 Signal processing controller: Intel Corporation Comet Lake Thermal Subsytem 00:14.0 USB controller: Intel Corporation Device 02ed 00:14.2 RAM memory: Intel Corporation Device 02ef 00:15.0 Serial bus controller [0c80]: Intel Corporation Serial IO I2C Host Controller 00:16.0 Communication controller: Intel Corporation Comet Lake Management Engine Interface 00:17.0 SATA controller: Intel Corporation Comet Lake SATA AHCI Controller 00:1c.0 PCI bridge: Intel Corporation Device 02bc (rev f0) 00:1d.0 PCI bridge: Intel Corporation Device 02b0 (rev f0) 00:1d.1 PCI bridge: Intel Corporation Device 02b1 (rev f0) 00:1d.4 PCI bridge: Intel Corporation Device 02b4 (rev f0) 00:1f.0 ISA bridge: Intel Corporation Device 0284 00:1f.3 Audio device: Intel Corporation Device 02c8 00:1f.4 SMBus: Intel Corporation Device 02a3 00:1f.5 Serial bus controller [0c80]: Intel Corporation Comet Lake SPI (flash) Controller 01:00.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06) 02:00.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06) 02:01.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06) 02:02.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06) 03:00.0 System peripheral: Intel Corporation JHL7540 Thunderbolt 3 NHI [Titan Ridge 2C 2018] (rev 06) 3a:00.0 USB controller: Intel Corporation JHL7540 Thunderbolt 3 USB Controller [Titan Ridge 2C 2018] (rev 06) 3b:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTL8411B PCI Express Card Reader (rev 01) 3b:00.1 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 12) 40:00.0 Network controller: Intel Corporation Wi-Fi 6 AX200 (rev 1a) 45:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981 inxi -G Graphics: Device-1: Intel UHD Graphics driver: i915 v: kernel Display: x11 server: X.Org 1.20.8 driver: modesetting unloaded: fbdev,vesa resolution: 2560x1440~60Hz OpenGL: renderer: Mesa Intel UHD Graphics (CML GT2) v: 4.6 Mesa 20.0.8 vainfo libva info: VA-API version 1.7.0 libva info: User environment variable requested driver 'iHD' libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so libva info: Found init function __vaDriverInit_1_7 libva info: va_openDriver() returns 0 vainfo: VA-API version: 1.7 (libva 2.6.0) vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 20.1.1 () vainfo: Supported profile and entrypoints VAProfileMPEG2Simple : VAEntrypointVLD VAProfileMPEG2Main : VAEntrypointVLD VAProfileH264Main : VAEntrypointVLD VAProfileH264Main : VAEntrypointEncSliceLP VAProfileH264High : VAEntrypointVLD VAProfileH264High : VAEntrypointEncSliceLP VAProfileJPEGBaseline : VAEntrypointVLD VAProfileJPEGBaseline : VAEntrypointEncPicture VAProfileH264ConstrainedBaseline: VAEntrypointVLD VAProfileH264ConstrainedBaseline: VAEntrypointEncSliceLP VAProfileVP8Version0_3 : VAEntrypointVLD VAProfileHEVCMain : VAEntrypointVLD VAProfileHEVCMain10 : VAEntrypointVLD VAProfileVP9Profile0 : VAEntrypointVLD VAProfileVP9Profile2 : VAEntrypointVLD glxinfo | grep -i opengl OpenGL vendor string: Intel OpenGL renderer string: Mesa Intel(R) UHD Graphics (CML GT2) OpenGL core profile version string: 4.6 (Core Profile) Mesa 20.0.8 OpenGL core profile shading language version string: 4.60 OpenGL core profile context flags: (none) OpenGL core profile profile mask: core profile OpenGL core profile extensions: OpenGL version
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
** Tags added: focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
It looks the same bug on my Linux Mint 19.2 Cinnamon, Linux Kernel: 4.15.0-72-generic Using second second monitor with NVIDIA Corporation GF108M [GeForce GT 525M] graphics. The error log is on tty1 console: [drm:intel_set_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
@tjaalton? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Hi Timo, I wanted to try the AMD64 version at: https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/2019-11-14/. But only unsigned kernels are shipped and I couldn't switch from UEFI or boot unsigned kernels, because it's a corporate machine. Do you have any ideas? Regards -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
@tjaalton I find this bug report useful since I can receive updates on how the situation evolves. If there are know separate subclasses of the issue which are fixed separately I agree that it would be a good idea to provide debugging steps here to classify each subclass and track the subclass as a separate bug. When the error in the title fully goes away, the bug can be closed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
there's a big rewrite of DP MST being done upstream https://patchwork.freedesktop.org/series/68359/ which is the last portion of it. You could try latest drm-tip mainline build from the mainline ppa to see if it's any better now. anyway, having 'fifo underrun' in dmesg can mean many things, and likely isn't the same cause for everyone on this bug, so I'm not sure it's useful to have a 3+ year old bug about it open. File a new bug if you still see it with the latest Ubuntu release and/or 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/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Do we have actually somebody assigned to this report? I've been playing with the module parameters but nothing seem to be helping. I added the debug parameter today, because none of the i915.enable_hangcheck=1 i915.error_capture=1 i915.verbose_state_checks=1 were helpful. Should I fill a bug report at Freedesktop? Regards -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Since my upgrade from 19.04 to 19.10 my T430 is facing a similar problem with i915 fifo underruns: The problem occurs by switching from user A to B. If user A is logged in and want to switch to another user B (e.g. admin), then after entering the credentials of the user B, the system hangs up. Sometimes the system does not hang up directly. In this case the lock screen pops up and if I try then to enter the credentials of user B again, then the system hangs up. If I enter the credentials of the former already logged in user A, then system does not hang up. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Just a small update: I have been using i915.enable_psr=0 i915.enable_dc=0 i915.enable_fbc=0 i915.enable_dp_mst=1 parameters for a few days, but except the very first or first two days when I unplugged the docking station, it doesn't helped at all. So I decided to add error_capture=1 (record the GPU state following a hang) and a few days later complete it with a manual/udev disable for the i915 rc6. The kernel parameter has been removed (https://bugzilla.redhat.com/show_bug.cgi?id=1573482), however the function is still in the driver (/sys/class/drm/card0/power/rc6_enable:1). Regards ** Bug watch added: Red Hat Bugzilla #1573482 https://bugzilla.redhat.com/show_bug.cgi?id=1573482 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Whoops. We still have the functionality of rc6, just under a different name https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fb6db0f5bf1d4d3a4af6242e287fa795221ec5b8 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
This time I've added 'i915.enable_psr=0 i915.enable_dc=0 i915.enable_fbc=0' to the kernel parameters. In the current session I had to manually reconnect the notebook to the docking station and after a few seconds, the displays came back to life. No flickering at all, it just took a little bit more time to came alive. Previously I could manage the external displays to work this way, but these remain flickering even after 20 minutes. But the CPU is clocked to 3.6GHz, kworker/0:1-kacpi_notify keep spiking the processor, I assume the lid open and close has triggered such action. In the meanwhile set the ACPI module to debug mode and I can see these messages in the dmesg, seems to be some general purpose events but I couldn't find such (hex or dec) numeric ID in the linux/drivers/platform/x86 /trace_state), there are a lot of executions: [ +0,000166] extrace-0141 ex_trace_point: Method Begin [0x3e97f7df:\_GPE._L69] execution. [ +0,03] extrace-0141 ex_trace_point: Method End [0x3e97f7df:\_GPE._L69] execution. What could be this address? This system seems to laggy and the CPU is around 70 oC, normally it would be somewhere around 40-50 oC. Regards -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Yes disabling multi-stream transport makes it a single stream, hence it can only then drive a single monitor. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
i915.enable_dp_mst=0 seems to disable one of the external monitors. $ modinfo i915 | grep enable_dp_mst parm: enable_dp_mst:Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true) (bool) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
I just recently created another report (https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1848123). So I'm using an HP 840 G5, connected with USB TypeC to Dock G4 which feeds two DP screens. After each wake from S3 sleep, both displays are flickering and all the cores are clocked to 3,6GHz if I use the intel_pstate driver, the lid is closed. Only a cold boot helps this time. I'll have a look on the Kernel parameters soon and update you. BR -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
** Tags added: cscc -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
If someone else has those issues with a USB-C Dock (Thunderbolt 3) I got rid of the issue by using the latest mainline Kernel: 5.1.0-050100-generic #201905052130 SMP Mon May 6 01:32:59 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux and the following Kernel config settings (/etc/default/grub): GRUB_CMDLINE_LINUX_DEFAULT=" quiet splash intel_idle.max_cstate=4 i915.enable_psr=0 i915.enable_dc=0 i915.enable_fbc=0 i915.enable_dp_mst=0" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
I'm facing this issue in the latest kernel mainline, too. CPU is an Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz (which uses i915 graphics). The graphic glitches were gone after some kernel update but the error messages in dmesg remained. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Since I'm also facing this bug I just want to confirm that the error also occurs on the latest mainline Kernel (5.1) and also on the current drm-tip kernel version (5.1.0.0994 from https://kernel.ubuntu.com /~kernel-ppa/mainline/drm-tip/2019-05-05/) I'm trying to use an additional monitor on my X380 Yoga using an USB-C Dock. During the boot process the error message appears: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO After the boot process the monitor is sometimes enabled, but only a couple of seconds. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
I think this issue has been affecting me for a few years now but I just recently started to look into it. My current system is Ubuntu 19.04 but this issue was present even when I was using 18.04 and 18.10 and even before that. OS: Ubuntu 19.04 CPU: Intel Core i7 6700 Graphics (integrated only): HD Graphics 530 (Skylake GT2) Anyway, from time to time only one of my monitors turn on. When that happens `dmesg | grep i915` prints this: ``` ➜ ~ dmesg -e | grep i915 [ +0.000545] i915 :00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem [ +0.000627] [drm] Finished loading DMC firmware i915/skl_dmc_ver1_27.bin (v1.27) [ +0.003052] [drm] Initialized i915 1.6.0 20181204 for :00:02.0 on minor 0 [ +0.36] snd_hda_intel :00:1f.3: bound :00:02.0 (ops i915_audio_component_bind_ops [i915]) [ +0.47] i915 :00:02.0: fb0: inteldrmfb frame buffer device [ +0.249846] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun ➜ ~ dmesg -T | grep i915 [Sat Apr 27 17:47:08 2019] i915 :00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem [Sat Apr 27 17:47:08 2019] [drm] Finished loading DMC firmware i915/skl_dmc_ver1_27.bin (v1.27) [Sat Apr 27 17:47:09 2019] [drm] Initialized i915 1.6.0 20181204 for :00:02.0 on minor 0 [Sat Apr 27 17:47:09 2019] snd_hda_intel :00:1f.3: bound :00:02.0 (ops i915_audio_component_bind_ops [i915]) [Sat Apr 27 17:47:09 2019] i915 :00:02.0: fb0: inteldrmfb frame buffer device [Sat Apr 27 17:47:09 2019] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun ``` When I switch to Wayland, sometimes none of my monitors turn on at all. Once when both turned on, I turned off one and tried to turn it back on again, but it went into energy saving mode. Then `dmesg` was showing this: ``` ➜ ~ dmesg -T | grep i915 [Sat Apr 27 18:14:17 2019] i915 :00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem [Sat Apr 27 18:14:17 2019] [drm] Finished loading DMC firmware i915/skl_dmc_ver1_27.bin (v1.27) [Sat Apr 27 18:14:18 2019] [drm] Initialized i915 1.6.0 20181204 for :00:02.0 on minor 0 [Sat Apr 27 18:14:18 2019] snd_hda_intel :00:1f.3: bound :00:02.0 (ops i915_audio_component_bind_ops [i915]) [Sat Apr 27 18:14:18 2019] i915 :00:02.0: fb0: inteldrmfb frame buffer device [Sat Apr 27 18:14:56 2019] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun ➜ ~ dmesg -e | grep i915 [ +0.000664] i915 :00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem [ +0.000861] [drm] Finished loading DMC firmware i915/skl_dmc_ver1_27.bin (v1.27) [ +0.016298] [drm] Initialized i915 1.6.0 20181204 for :00:02.0 on minor 0 [ +0.47] snd_hda_intel :00:1f.3: bound :00:02.0 (ops i915_audio_component_bind_ops [i915]) [ +0.47] i915 :00:02.0: fb0: inteldrmfb frame buffer device [ +23.689059] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun ``` I have attached the complete dmesg output in case that might help. ** Attachment added: "dmesg.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+attachment/5259448/+files/dmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
I suspect the Xorg modesetting driver's atomic logic might have something to do with this. Can someone experiencing the problem please try logging into 'Ubuntu on Wayland' and tell us if that avoids the issue? ** Also affects: xorg-server (Ubuntu) Importance: Undecided Status: New ** Changed in: xorg-server (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/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1550779] Re: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
** Summary changed: - [Lenovo ThinkPad X220] *ERROR* CPU pipe A FIFO underrun - Xorg glitches + [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun ** Tags removed: wily ** Tags added: bionic ** Tags added: xenial ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
