As for me there are 2 ways to get rid of flickering, but both are not make me happy: Either in grub add: - GRUB_CMDLINE_LINUX="intel_idle.max_cstate=4" or (that is new to me) - change screen resolution(!?!) Anything else than 1920x1080 works! If I can add custom resolutions I would play with that. But only 1600x900 matches my ration.
Maybe this 2nd workaround gives the developers a clue what is the original issue here. Hope to get some feedback. Maybe this is the reason there are not to many that complains about that issue, although nowaday this resolution is standard. Beside that I have testet a lot of other things, kernel options as GRUB_CMDLINE_LINUX="i915.enable_psr=0" or in i915.conf options i915 enable_guc=2 options i915 fastboot=1 -- 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/1872760 Title: i915 - after return from suspend display is flickering Status in linux package in Ubuntu: Confirmed Bug description: Test this with Ubuntu 20.04 (Mate) beta installer. Also happen with current official version. Kernel is 5.4.0-21 #25 (if I remember right). All works fine, but after returning from suspend the display is flickering. For the installer / USB stick usage that might not be a problem, but the same behaviour in a normal environment would be a no go (for using suspend) Graphics is driven by an Intel Skylake core-m5 processor. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: user 1124 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: MATE DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-04-17 (0 days ago) InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Beta amd64 (20200402) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 8087:0a2b Intel Corp. Bus 001 Device 002: ID 04f2:b560 Chicony Electronics Co., Ltd HP HD Camera Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: HP HP EliteBook Folio G1 Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-24-generic root=UUID=8fb86658-3799-4204-94df-7cf37441baa3 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30 RelatedPackageVersions: linux-restricted-modules-5.4.0-24-generic N/A linux-backports-modules-5.4.0-24-generic N/A linux-firmware 1.187 Tags: focal Uname: Linux 5.4.0-24-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 01/05/2020 dmi.bios.vendor: HP dmi.bios.version: N91 Ver. 01.45 dmi.board.name: 8170 dmi.board.vendor: HP dmi.board.version: KBC Version 29.73 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.modalias: dmi:bvnHP:bvrN91Ver.01.45:bd01/05/2020:svnHP:pnHPEliteBookFolioG1:pvr:rvnHP:rn8170:rvrKBCVersion29.73:cvnHP:ct10:cvr: dmi.product.family: 103C_5336AN dmi.product.name: HP EliteBook Folio G1 dmi.product.sku: V1C39EA#ABD dmi.sys.vendor: HP --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: user 1124 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: MATE DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-04-17 (0 days ago) InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Beta amd64 (20200402) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 8087:0a2b Intel Corp. Bus 001 Device 002: ID 04f2:b560 Chicony Electronics Co., Ltd HP HD Camera Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: HP HP EliteBook Folio G1 Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-24-generic root=UUID=8fb86658-3799-4204-94df-7cf37441baa3 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30 RelatedPackageVersions: linux-restricted-modules-5.4.0-24-generic N/A linux-backports-modules-5.4.0-24-generic N/A linux-firmware 1.187 Tags: focal Uname: Linux 5.4.0-24-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 01/05/2020 dmi.bios.vendor: HP dmi.bios.version: N91 Ver. 01.45 dmi.board.name: 8170 dmi.board.vendor: HP dmi.board.version: KBC Version 29.73 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.modalias: dmi:bvnHP:bvrN91Ver.01.45:bd01/05/2020:svnHP:pnHPEliteBookFolioG1:pvr:rvnHP:rn8170:rvrKBCVersion29.73:cvnHP:ct10:cvr: dmi.product.family: 103C_5336AN dmi.product.name: HP EliteBook Folio G1 dmi.product.sku: V1C39EA#ABD dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872760/+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
