Ryzen5 2500U Vega 8 raven ridge flickering screen

[Lukas Wiest]

Hey,

I'm running Ubuntu 18.10 on a Lenovo Yoga 530 14-AHR.
My display is flickering, depending on the displayed content in different frequency.

Video of the symptom: https://www.dropbox.com/s/ulbqo7taspx60vv/VID_20190123_151449.mp4?dl=0
---
ProblemType: Bug
ApportVersion: 2.20.10-0ubuntu13.2
Architecture: amd64
CurrentDesktop: X-Cinnamon
DistroRelease: Ubuntu 18.10
InstallationDate: Installed on 2018-11-09 (160 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
Package: linux (not installed)
Tags: cosmic
Uname: Linux 5.0.0-050000-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo users vboxusers wireshark
_MarkForUpload: True
---
ProblemType: Bug
ApportVersion: 2.20.10-0ubuntu13.2
Architecture: amd64
CurrentDesktop: X-Cinnamon
DistroRelease: Ubuntu 18.10
InstallationDate: Installed on 2018-11-09 (161 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
Package: linux (not installed)
Tags: cosmic
Uname: Linux 5.0.8-050008-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo users vboxusers wireshark
_MarkForUpload: True

[Lukas Wiest (lukas-wiest)]

apport information

[Lukas Wiest (lukas-wiest)]

apport information

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1825554

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.

[Lukas Wiest (lukas-wiest)]

apport information

[Lukas Wiest (lukas-wiest)]

apport information

[Kai-Heng Feng (kaihengfeng)]

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v5.1-rc5 kernel [0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed”, and attach dmesg.

Thanks in advance.

[0] https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.1-rc5/

[Lukas Wiest (lukas-wiest)]

Hey, it's present in newest upstream kernel aswell.

Attached is a dmesg output running the system on your testkernel for disco on cosmic for the touchpad.

[Lukas Wiest (lukas-wiest)]

If it's in anyway helpful, here's an Xorg log of my device

[Kai-Heng Feng (kaihengfeng)]

Sorry for the late reply.

Please test latest mainline kernel again:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.2-rc7/

If the issue persists, please file an upstream bug at https://bugs.freedesktop.org/
Product: DRI
Component: DRM/amdgpu

[Lukas Wiest (lukas-wiest)]

I was now able to reproduce this behaviour on Windows as well, and sent it for repair. They changed the LCD panel which was faulty and now everyting's ok. So, sorry for the inconvenience.