** Changed in: linux (Ubuntu Hirsute)
Status: Confirmed => Fix Committed
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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:
Fix Committed
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.
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