** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Xenial)
Status: New => Triaged
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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1661695
Title:
screen flickering raedon
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Xenial:
Triaged
Bug description:
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.
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