Artifacts when connected to an external 4K display
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Invalid
|
Undecided
|
Unassigned |
Bug Description
I get artifacts when I connect my laptop (Lenovo X1 7th Gen) to an external 4k monitor via usb-c->DP.
See the attached screenshot.
This happened after I upgraded to ubuntu 20.04.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSign
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckR
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Thu Apr 23 22:35:27 2020
DistUpgraded: 2020-04-23 22:04:58,240 DEBUG Running PostInstallScript: './xorg_
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
nvidia, 440.64, 5.3.0-48-generic, x86_64: installed
nvidia, 440.64, 5.4.0-26-generic, x86_64: installed
v4l2loopback, 0.12.3, 5.3.0-48-generic, x86_64: installed
v4l2loopback, 0.12.3, 5.4.0-26-generic, x86_64: installed
ExtraDebuggingI
GraphicsCard:
Intel Corporation UHD Graphics 620 (Whiskey Lake) [8086:3ea0] (rev 02) (prog-if 00 [VGA controller])
Subsystem: Lenovo UHD Graphics 620 (Whiskey Lake) [17aa:2292]
InstallationDate: Installed on 2019-10-07 (199 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
MachineType: LENOVO 20QDCTO1WW
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-04-23 (0 days ago)
dmi.bios.date: 03/18/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N2HET47W (1.30 )
dmi.board.
dmi.board.name: 20QDCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.family: ThinkPad X1 Carbon 7th
dmi.product.name: 20QDCTO1WW
dmi.product.sku: LENOVO_
dmi.product.
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.
version.
version.
version.
version.
version.
version.
Thank you for your bug report. The log has
[ 12.559830] Call Trace: do_ioctl+ 0x1a7/0x410 [videodev] 0x2b5/0x670 [videodev] 0x670/0x670 [videodev] 0x15/0x20 [videodev] 0x4c/0x60 [videodev] ioctl+0x407/ 0x670 0x67/0x90 ioctl+0x1a/ 0x20 64+0x57/ 0x190 64_after_ hwframe+ 0x44/0xa9
[ 12.559838] __video_
[ 12.559844] video_usercopy+
[ 12.559848] ? v4l_s_fmt+
[ 12.559854] video_ioctl2+
[ 12.559859] v4l2_ioctl+
[ 12.559863] do_vfs_
[ 12.559865] ? putname+0x4a/0x50
[ 12.559866] ksys_ioctl+
[ 12.559868] __x64_sys_
[ 12.559870] do_syscall_
[ 12.559873] entry_SYSCALL_
Looks like it"s rather a kernel driver issue