Red Hat Bugzilla – Bug 496333
M22 / Radeon X300 dual display doesn't work with KMS
Last modified: 2018-04-11 15:22:40 EDT
Created attachment 340087 [details]
Description of problem:
01:00.0 VGA compatible controller: ATI Technologies Inc M22 [Mobility Radeon X300]
Dual display works fine without KMS.
With KMS one of the displays shows noise. Initially (in gdm with mirrored displays) the laptops own display is fine while the external display is corrupted. When I log in and my display settings are applied the external screen (which I use as primary) is fine while the laptops display is corrupted.
Initially the noise was pure digital (as if wrong memory areas had been mapped), but later it also showed psycedelic fading colors.
Version-Release number of selected component (if applicable):
Created attachment 340089 [details]
(EE) RADEON(0): ADVANCE_RING count != expected (14 vs 16) at radeon_textured_videofuncs.c:1623
Forgot to say that the displays were correctly mirrored during boot, until X started
With kernel-PAE-188.8.131.52-102.fc11.i686 and KMS and no external display I get psycedelic fading colors on the internal display. The only solution is to reboot and use nomodeset.
I think this almost qualifies as a f11 blocker?
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle.
Changing version to '11'.
More information and reason for this action is here:
The machine has been upgraded to Fedora 12, so I can't/won't test this. But apparently similar problems are seen in Fedora 12 and reported in bug 521161.
*** This bug has been marked as a duplicate of bug 521161 ***