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 string: 4.6 (Compatibility Profile) Mesa 20.0.8
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 20.0.8
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
OpenGL ES profile extensions:
dmesg | grep -i i915 (here is where i get some errors)
[ 1.867750] i915 0000:00:02.0: VT-d active for gfx access
[ 1.867792] i915 0000:00:02.0: vgaarb: deactivate vga console
[ 1.869955] i915 0000:00:02.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 1.870380] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
[ 1.901537] [drm] Initialized i915 1.6.0 20190822 for 0000:00:02.0 on minor 0
[ 1.942047] fbcon: i915drmfb (fb0) is primary device
[ 1.942050] i915 0000:00:02.0: fb0: i915drmfb frame buffer device
[ 4.475863] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops
i915_audio_component_bind_ops [i915])
[ 343.832335] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe
B FIFO underrun
[ 1533.852245] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[ 7999.870873] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[10325.714958] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[11963.761144] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR*
failed to enable link training
[11966.525181] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR*
failed to enable link training
[11966.808691] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[12009.683387] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
[12078.020618] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1550779
Title:
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A
FIFO underrun
Status in linux package in Ubuntu:
Confirmed
Status in xorg-server package in Ubuntu:
Incomplete
Bug description:
Upgraded linux-image-extra-4.2.0-30-generic I see graphic glitches,
looks like the graphic buffer gets screwed up
- funny repetition's patterns (back in time glitches)
- black screen (<1sec)
- graphic errors
I can influence the severity of the issue with switching windows and
using certain programs, e.g. Google Maps in chrome causes this issue
reproducibly
dmesg | grep i915
[ 2.726864] [drm] Initialized i915 1.6.0 20150522 for 0000:00:02.0 on
minor 0
[ 2.792005] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit
banging on pin 5
[ 3.471092] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 3.471093] i915 0000:00:02.0: registered panic notifier
[ 9.573129] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
[ 9.574847] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[ 9.574895] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun
linux-image-extra-4.2.0-27-generic works find
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-30.36-generic 4.2.8-ckt3
Uname: Linux 4.2.0-30-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
BootLog:
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: GNOME
Date: Sat Feb 27 20:26:07 2016
DistUpgraded: Fresh install
DistroCodename: wily
DistroVariant: ubuntu
DkmsStatus:
virtualbox, 5.0.14, 4.2.0-27-generic, x86_64: installed
virtualbox, 5.0.14, 4.2.0-30-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
Intel Corporation 2nd Generation Core Processor Family Integrated Graphics
Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:21da]
InstallationDate: Installed on 2016-02-11 (15 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: LENOVO 42912XG
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.2.0-30-generic
root=UUID=cb34d7bb-9316-49b3-aa94-4e2a3512168f ro rootflags=subvol=@ noprompt
quiet
SourcePackage: xorg
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/18/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET69WW (1.39 )
dmi.board.asset.tag: Not Available
dmi.board.name: 42912XG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr8DET69WW(1.39):bd07/18/2013:svnLENOVO:pn42912XG:pvrThinkPadX220:rvnLENOVO:rn42912XG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 42912XG
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12.2+15.10.20151202-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.64-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:7.5.0+git20150819-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20150808-0ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.11-1ubuntu3
xserver.bootTime: Sat Feb 27 20:25:23 2016
xserver.configfile: default
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
product id 12359
vendor SEC
xserver.version: 2:1.17.2-1ubuntu9.1
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