https://bugs.freedesktop.org/show_bug.cgi?id=96868
Bug ID: 96868
Summary: AMDGPU Tonga only does 2560x1440 at 120hz, switching
to 144hz causes display errors, same thing used to
happen with fglrx.
Product: xorg
Version: 7.7 (2012.06)
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: Driver/AMDgpu
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
Using the opensource AMDgpu driver with an AMD R9 380 on a Benq XL2730Z causes
major display corruption when set to native resolution and a 144hz refresh
rate.
The same problem used to occur with fglrx, but had been fixed recently.
On the, now working, fglrx system xvidtune shows the modeline:
"2560x1440" 586.00 2560 2568 2600 2640 1440 1465 1473 1543 +hsync -vsync
Running xvidtune on the AMDgpu system shows the exact same current modeline.
Only this time the screen flickers constantly and just the top ~13% of the
screen is somewhat visible, every line below is unstable, interlaced,
corrupted.
Setting the display to 120hz gives a modeline:
"2560x1440" 482.64 2560 2568 2600 2640 1440 1447 1455 1525 +hsync -vsync
And seems to work just fine. The same goes for 100 and 60Hz.
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