Public bug reported: I’m trying to revive a slightly old Lenovo Z70-80. I haven’t used it for a month or so. Then, I downloaded all the latest updates a couple of weeks ago and something broke. The screen looks as if it's tearing many times per second and some of the middle pixels are repeated on the edge of the screen. I've never seen it behave like that.
I've had problems with Prime on this machine many times before, so I followed the usual steps: ensuing that nouveau is blacklisted, rebuilding the modules, using a custom xorg config, trying out multiple different driver versions, etc. Nothing helped. I even tried a complete re-install of Ubuntu, however, that didn’t help (everything was fine during the install). I still had an older kernel installed on my machine (5.11.0-16), I booted into it, built all the modules, etc (it started with Intel only, I believe). After a reboot back into 5.11.0-16, the Nvidia drivers started working perfectly. No matter which version. They're still broken in 5.11.0-25 and the kernel is the only difference. I've mentioned this on Nvidia forums already, but my post didn't get any attention there. It contains a few more details, like the Nvidia debug capture and a video of the craziness on my screen: https://forums.developer.nvidia.com/t/severely-distorted-image-on-a- laptop-with-ubuntu-21-04-nvidia-840m-470-57-02-and-older-drivers/185117 ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: linux-image-5.11.0-25-generic 5.11.0-25.27 ProcVersionSignature: Ubuntu 5.11.0-25.27-generic 5.11.22 Uname: Linux 5.11.0-25-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: manvydas 1414 F.... pulseaudio /dev/snd/controlC0: manvydas 1414 F.... pulseaudio CasperMD5CheckResult: pass Date: Wed Aug 4 20:11:57 2021 InstallationDate: Installed on 2021-07-27 (7 days ago) InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420) MachineType: LENOVO 80FG ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-25-generic root=UUID=363daad8-ef8a-44a7-a6b3-a879007f38d8 ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.11.0-25-generic N/A linux-backports-modules-5.11.0-25-generic N/A linux-firmware 1.197.2 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/22/2015 dmi.bios.release: 1.96 dmi.bios.vendor: LENOVO dmi.bios.version: ABCN96WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: Lenovo Z70-80 dmi.board.vendor: LENOVO dmi.board.version: NO DPK dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Z70-80 dmi.ec.firmware.release: 1.96 dmi.modalias: dmi:bvnLENOVO:bvrABCN96WW:bd09/22/2015:br1.96:efr1.96:svnLENOVO:pn80FG:pvrLenovoZ70-80:rvnLENOVO:rnLenovoZ70-80:rvrNODPK:cvnLENOVO:ct10:cvrLenovoZ70-80: dmi.product.family: IDEAPAD dmi.product.name: 80FG dmi.product.sku: LENOVO_MT_80FG_BU_idea_FM_Lenovo Z70-80 dmi.product.version: Lenovo Z70-80 dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug hirsute kernel-bug nvidia prime -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1938936 Title: Broken Nvidia Prime on Lenovo Z70-80 (Nvidia 840m) Status in linux package in Ubuntu: New Bug description: I’m trying to revive a slightly old Lenovo Z70-80. I haven’t used it for a month or so. Then, I downloaded all the latest updates a couple of weeks ago and something broke. The screen looks as if it's tearing many times per second and some of the middle pixels are repeated on the edge of the screen. I've never seen it behave like that. I've had problems with Prime on this machine many times before, so I followed the usual steps: ensuing that nouveau is blacklisted, rebuilding the modules, using a custom xorg config, trying out multiple different driver versions, etc. Nothing helped. I even tried a complete re-install of Ubuntu, however, that didn’t help (everything was fine during the install). I still had an older kernel installed on my machine (5.11.0-16), I booted into it, built all the modules, etc (it started with Intel only, I believe). After a reboot back into 5.11.0-16, the Nvidia drivers started working perfectly. No matter which version. They're still broken in 5.11.0-25 and the kernel is the only difference. I've mentioned this on Nvidia forums already, but my post didn't get any attention there. It contains a few more details, like the Nvidia debug capture and a video of the craziness on my screen: https://forums.developer.nvidia.com/t/severely-distorted-image-on-a- laptop-with-ubuntu-21-04-nvidia-840m-470-57-02-and-older- drivers/185117 ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: linux-image-5.11.0-25-generic 5.11.0-25.27 ProcVersionSignature: Ubuntu 5.11.0-25.27-generic 5.11.22 Uname: Linux 5.11.0-25-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: manvydas 1414 F.... pulseaudio /dev/snd/controlC0: manvydas 1414 F.... pulseaudio CasperMD5CheckResult: pass Date: Wed Aug 4 20:11:57 2021 InstallationDate: Installed on 2021-07-27 (7 days ago) InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420) MachineType: LENOVO 80FG ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-25-generic root=UUID=363daad8-ef8a-44a7-a6b3-a879007f38d8 ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.11.0-25-generic N/A linux-backports-modules-5.11.0-25-generic N/A linux-firmware 1.197.2 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/22/2015 dmi.bios.release: 1.96 dmi.bios.vendor: LENOVO dmi.bios.version: ABCN96WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: Lenovo Z70-80 dmi.board.vendor: LENOVO dmi.board.version: NO DPK dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Z70-80 dmi.ec.firmware.release: 1.96 dmi.modalias: dmi:bvnLENOVO:bvrABCN96WW:bd09/22/2015:br1.96:efr1.96:svnLENOVO:pn80FG:pvrLenovoZ70-80:rvnLENOVO:rnLenovoZ70-80:rvrNODPK:cvnLENOVO:ct10:cvrLenovoZ70-80: dmi.product.family: IDEAPAD dmi.product.name: 80FG dmi.product.sku: LENOVO_MT_80FG_BU_idea_FM_Lenovo Z70-80 dmi.product.version: Lenovo Z70-80 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1938936/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
