Update. Today I experienced this: after suspending the laptop, now I do not experience broken rendering anymore. This happened once before. Everytime I reboot, it comes back.
I'll try to identify a pattern here. ** Description changed: - This is a very wierd behavior I get on the Lenovo Yoga S940 after - upgrading to 19.10. + This is a very wierd behavior I get on the Lenovo Yoga S940 after upgrading to 19.10. + This makes the laptop almost unusable with its own display. + This happens only on the laptop display, not on the external display. - Basically the rendering on the laptop display is... messy, I'll try to - describe how as - * screenshots always take it ok + The render of portions of the screen does not happen after some events (listed below) resulting in all or part of the screen not being re-rendered. The UX is that nothing happened, but it has. + This happens after: + + * key-stroke while typing sometimes + * alt-tab + * shift-right to align window to the right + * ctrl-pgup/down to switch tab in multi tabs apps. + + + Please note that: + * screenshots can't see the problem * also screenrecorder always seem ok, despite rendering being broken. - What heppen is: - - When I alt-tab or switch tabs or align window right, the rendering does not happen completely, so the screen displays part of the old status and part of the new. - If I then alt-tab again for example, or move the mouse cursor over the portions that has not rendered properly, the renders happens. - - This happens only on the laptop display, not on the external display. - - This makes the laptop almost unusable with its own display. - - I will need to go back to 19.04, if there's something I can do to help - debug this I'd rather do. ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: xorg 1:7.7+19ubuntu12 ProcVersionSignature: Ubuntu 5.3.0-13.14-generic 5.3.0 Uname: Linux 5.3.0-13-generic x86_64 ApportVersion: 2.20.11-0ubuntu7 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Tue Oct 1 13:13:40 2019 DistUpgraded: 2019-09-21 10:16:26,647 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' DistroCodename: eoan DistroVariant: ubuntu 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:3801] + Intel Corporation UHD Graphics 620 (Whiskey Lake) [8086:3ea0] (rev 02) (prog-if 00 [VGA controller]) + Subsystem: Lenovo UHD Graphics 620 (Whiskey Lake) [17aa:3801] InstallationDate: Installed on 2019-09-12 (18 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) MachineType: LENOVO 81Q7 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.3.0-13-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to eoan on 2019-09-21 (10 days ago) dmi.bios.date: 06/12/2019 dmi.bios.vendor: LENOVO dmi.bios.version: AKCN34WW dmi.board.asset.tag: No Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Yoga S940-14IWL dmi.modalias: dmi:bvnLENOVO:bvrAKCN34WW:bd06/12/2019:svnLENOVO:pn81Q7:pvrLenovoYogaS940-14IWL:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrLenovoYogaS940-14IWL: dmi.product.family: Yoga S940-14IWL dmi.product.name: 81Q7 dmi.product.sku: LENOVO_MT_81Q7_BU_idea_FM_Yoga S940-14IWL dmi.product.version: Lenovo Yoga S940-14IWL dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.99-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 19.1.6-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.5+git20190820-0ubuntu3 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20190815-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1846201 Title: Rendering is delayed on laptop display (works in external display) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1846201/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
