[Bug 21413] New: Screen blanks after latest pll changes in Git

[bugzilla-daemon at freedesktop.org]

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: xorg-driver-ati at lists.x.org
        ReportedBy: monraaf at gmail.com
         QAContact: xorg-team at lists.x.org


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 <alexdeucher at gmail.com>
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


-- 
Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.