http://bugs.freedesktop.org/show_bug.cgi?id=21413
Summary: Screen blanks after latest pll changes in Git
Product: xorg
Version: git
Platform: Other
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Driver/Radeon
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
Created an attachment (id=25149)
--> (http://bugs.freedesktop.org/attachment.cgi?id=25149)
Xorg log
I have a Samsung 215TW monitor connected to the DVI output of a radeon HD 3200
IGP, all was working well till the recent changes to the pll code in git
master.
Now I have random screen blanking and random noise in the picture. The screen
blanking is at it's worst when playing a 720p movie, then the screen will blank
up to several times a minute.
The offending commit:
commit 24e4b73b4fbbb2c790e6120ede3caaa4e7e58359
Author: Alex Deucher <[email protected]>
Date: Wed Apr 22 11:42:18 2009 -0400
radeon pll: add support for fractional feedback divs
Differences in the Xorg.0.log before(-) and after the commit(+).
freq: 146250000
-best_freq: 146243000
-best_feedback_div: 817
-best_ref_div: 10
-best_post_div: 8
+best_freq: 146249974
+best_feedback_div: 786
+best_frac_feedback_div: 4
+best_ref_div: 11
+best_post_div: 7
(II) RADEON(0): crtc(0) Clock: mode 146250, PLL 146240
-(II) RADEON(0): crtc(0) PLL : refdiv 10, fbdiv 0x331(817), pdiv 8
+(II) RADEON(0): crtc(0) PLL : refdiv 11, fbdiv 0x312(786), fracfbdiv 4, pdiv
7
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