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
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
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
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
RfKill:
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.
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1661695
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.