Bug 27083

Summary: Commit "use lcd pll limits when available" in drm-radeon-testing breaks my laptop lvds
Product: DRI Reporter: Stefano Carignano <scary.moo>
Component: DRM/RadeonAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: medium CC: schmidt
Version: DRI git   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
remove lvds quirks
none
disable lcd pll code none

Description Stefano Carignano 2010-03-15 05:15:51 UTC 
As the summary says, commit 86cb2bbfda2cf402aee46779ee90bbb7d915482b (drm/radeon/kms: use lcd pll limits when available) in drm-radeon-testing produces unwatchable fuzziness on my laptop screen (toshiba a300, hd3470 mobility). Reverting the commit brings the laptop back to an usable state.
Some system info was already attached at the (old, similar, fixed) bug 
http://bugs.freedesktop.org/show_bug.cgi?id=26358
Comment 1 Alex Deucher 2010-03-15 10:08:40 UTC 
Created attachment 34076 [details] [review]
remove lvds quirks

Perhaps with the new code the quirk from the other bug isn't necessary.  Does this patch help?  It removes the LVDS quirks.
Comment 2 Alexandre Derumier 2010-03-16 02:44:41 UTC 
i confirm, with the pll limits patch, i doesn't need the lvds quirk for my dell studio laptop 15.
Comment 3 Stefano Carignano 2010-03-16 02:58:03 UTC 
seems to be working here as well, thanks!
Comment 4 Alex Deucher 2010-03-16 06:56:08 UTC 
*** Bug 27106 has been marked as a duplicate of this bug. ***
Comment 5 Alex Deucher 2010-03-16 07:01:21 UTC 
Created attachment 34106 [details] [review]
disable lcd pll code

I suspect the pll algo fixes are actually what fixed things.  Can you try this patch as well (in addition to the previous one)?
Comment 6 Christian Schmidt 2010-03-16 09:46:47 UTC 
Both patches together work for my duplicate T500 bug.
Comment 7 Stefano Carignano 2010-03-17 01:43:39 UTC 
the second patch didn't break anything here as well :)
Comment 8 Alex Deucher 2010-03-17 20:30:41 UTC 
I've sent the combined patch to Dave.  thanks!

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