Thank you for your bug report. The log has [ 12.559830] Call Trace: [ 12.559838] __video_do_ioctl+0x1a7/0x410 [videodev] [ 12.559844] video_usercopy+0x2b5/0x670 [videodev] [ 12.559848] ? v4l_s_fmt+0x670/0x670 [videodev] [ 12.559854] video_ioctl2+0x15/0x20 [videodev] [ 12.559859] v4l2_ioctl+0x4c/0x60 [videodev] [ 12.559863] do_vfs_ioctl+0x407/0x670 [ 12.559865] ? putname+0x4a/0x50 [ 12.559866] ksys_ioctl+0x67/0x90 [ 12.559868] __x64_sys_ioctl+0x1a/0x20 [ 12.559870] do_syscall_64+0x57/0x190 [ 12.559873] entry_SYSCALL_64_after_hwframe+0x44/0xa9
Looks like it"s rather a kernel driver issue ** Package changed: xorg (Ubuntu) => linux (Ubuntu) -- 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/1874543 Title: Artifacts when connected to an external 4K display Status in linux package in Ubuntu: Confirmed 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 ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30 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' CasperMD5CheckResult: skip 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_fix_proprietary.py' 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 ExtraDebuggingInterest: Yes, including running git bisection searches 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=/vmlinuz-5.4.0-26-generic root=UUID=298d5179-f5b4-410d-aafb-92630b5b48a1 ro quiet splash vt.handoff=7 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.asset.tag: Not Available dmi.board.name: 20QDCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN2HET47W(1.30):bd03/18/2020:svnLENOVO:pn20QDCTO1WW:pvrThinkPadX1Carbon7th:rvnLENOVO:rn20QDCTO1WW:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon 7th dmi.product.name: 20QDCTO1WW dmi.product.sku: LENOVO_MT_20QD_BU_Think_FM_ThinkPad X1 Carbon 7th dmi.product.version: ThinkPad X1 Carbon 7th dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.101-2 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1874543/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
