** Description changed: 4.4.0-53 WORKS FINE 4.4.0-62 DOES NOT WORK (screen flickers) It seems there is a problem with powersafe: With auto: echo auto > /sys/class/drm/card0/device/power_dpm_force_performance_level you will see heavy screen flickering on higher display resolutions With low or high: echo low > /sys/class/drm/card0/device/power_dpm_force_performance_level or echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level there is no screen flickering And having performance level set to HIGH at all times is not a workaround because it wears out the card. :( details: Linux CINNAMON 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux - ``` - Vendor: X.Org (0x1002) - Device: AMD PITCAIRN (DRM 2.43.0 / 4.4.0-62-generic, LLVM 5.0.0) (0x6811) - Version: 17.1.0 - Accelerated: yes - Video memory: 2048MB - Unified memory: no - Preferred profile: core (0x1) - Max core profile version: 4.2 - Max compat profile version: 3.0 - Max GLES1 profile version: 1.1 - Max GLES[23] profile version: 3.0 + Vendor: X.Org (0x1002) + Device: AMD PITCAIRN (DRM 2.43.0 / 4.4.0-62-generic, LLVM 5.0.0) (0x6811) + Version: 17.1.0 + Accelerated: yes + Video memory: 2048MB + Unified memory: no + Preferred profile: core (0x1) + Max core profile version: 4.2 + Max compat profile version: 3.0 + Max GLES1 profile version: 1.1 + Max GLES[23] profile version: 3.0 OpenGL vendor string: X.Org OpenGL renderer string: Gallium 0.4 on AMD PITCAIRN (DRM 2.43.0 / 4.4.0-62-generic, LLVM 5.0.0) OpenGL core profile version string: 4.2 (Core Profile) Mesa 17.1.0-devel - padoka PPA OpenGL core profile shading language version string: 4.20 OpenGL core profile context flags: (none) OpenGL core profile profile mask: core profile ``` - --- + --- ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC2: atomi 3734 F.... pulseaudio - /dev/snd/controlC0: atomi 3734 F.... pulseaudio - /dev/snd/controlC1: atomi 3734 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC2: atomi 3734 F.... pulseaudio + /dev/snd/controlC0: atomi 3734 F.... pulseaudio + /dev/snd/controlC1: atomi 3734 F.... pulseaudio CurrentDesktop: X-Cinnamon DistroRelease: Linux 18.1 HibernationDevice: RESUME=UUID=30254b0c-14d7-4c0e-9168-a8d492fa027b InstallationDate: Installed on 2016-12-27 (37 days ago) InstallationMedia: Linux Mint 18.1 "Serena" - Release amd64 20161213 MachineType: Gigabyte Technology Co., Ltd. GA-78LMT-USB3 Package: linux (not installed) ProcEnviron: - TERM=xterm-256color - PATH=(custom, no user) - XDG_RUNTIME_DIR=<set> - LANG=en_US.UTF-8 - SHELL=/usr/bin/zsh + TERM=xterm-256color + PATH=(custom, no user) + XDG_RUNTIME_DIR=<set> + LANG=en_US.UTF-8 + SHELL=/usr/bin/zsh ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-53-generic root=UUID=41cc7dce-52e8-4b29-9347-60afc0a7d0ed ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30 RelatedPackageVersions: - linux-restricted-modules-4.4.0-53-generic N/A - linux-backports-modules-4.4.0-53-generic N/A - linux-firmware 1.157.6 + linux-restricted-modules-4.4.0-53-generic N/A + linux-backports-modules-4.4.0-53-generic N/A + linux-firmware 1.157.6 RfKill: - 0: hci0: Bluetooth - Soft blocked: no - Hard blocked: no + 0: hci0: Bluetooth + Soft blocked: no + Hard blocked: no Tags: serena Uname: Linux 4.4.0-53-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 04/23/2013 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: FA dmi.board.name: GA-78LMT-USB3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrFA:bd04/23/2013:svnGigabyteTechnologyCo.,Ltd.:pnGA-78LMT-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-78LMT-USB3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-78LMT-USB3 dmi.sys.vendor: Gigabyte Technology Co., Ltd.
** Tags added: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1661695 Title: screen flickering raedon To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1661695/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
