Public bug reported:
[Impact]
Screen flickers rapidly when two 4K 60Hz monitors are connected to AMD
Oland GFX.
[Fix]
Disable certain power saving feature to keep the performance to output
two 4K 60Hz monitors.
[Test]
Plug two 4K 60Hz and stare at the monitors.
With the patch applied, no more flickers on the screen.
[Where problems could occur]
The GFX clock was restrained for stability on laptops. So if those
laptops have ability to output to dual 4K 60Hz monitors, the systems can
become unstable.
However, Oland is really old chip, those laptops neither have 4K
LVDS, nor have 4K capable HDMI/DP output.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Won't Fix
** Affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Affects: linux (Ubuntu Hirsute)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.10 (Ubuntu Hirsute)
Importance: Undecided
Status: Invalid
** Tags: oem-priority originate-from-1916426 originate-from-1921998 stella
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-oem-5.10 (Ubuntu)
Status: New => Invalid
** Changed in: linux-oem-5.10 (Ubuntu Hirsute)
Status: New => Invalid
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Hirsute)
Status: New => Confirmed
** Changed in: linux (Ubuntu Hirsute)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Focal)
Status: New => Won't Fix
** Changed in: linux (Ubuntu)
Status: New => Confirmed
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Tags added: oem-priority originate-from-1916426 stella
** Tags added: originate-from-1921998
--
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/1928361
Title:
Fix screen flickering when two 4K 60Hz monitors are connected to AMD
Oland GFX
Status in HWE Next:
New
Status in linux package in Ubuntu:
Confirmed
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Won't Fix
Status in linux-oem-5.10 source package in Focal:
Confirmed
Status in linux source package in Hirsute:
Confirmed
Status in linux-oem-5.10 source package in Hirsute:
Invalid
Bug description:
[Impact]
Screen flickers rapidly when two 4K 60Hz monitors are connected to AMD
Oland GFX.
[Fix]
Disable certain power saving feature to keep the performance to output
two 4K 60Hz monitors.
[Test]
Plug two 4K 60Hz and stare at the monitors.
With the patch applied, no more flickers on the screen.
[Where problems could occur]
The GFX clock was restrained for stability on laptops. So if those
laptops have ability to output to dual 4K 60Hz monitors, the systems can
become unstable.
However, Oland is really old chip, those laptops neither have 4K
LVDS, nor have 4K capable HDMI/DP output.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1928361/+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
