Bug 26927

Summary: Blank LVDS Dell Studio 17
Product: DRI Reporter: Damien Mir <dm>
Component: DRM/RadeonAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED INVALID QA Contact:
Severity: critical    
Priority: medium    
Version: XOrg git   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
requested vbios dump
none
lspci output none

Description Damien Mir 2010-03-06 08:35:25 UTC 
When using linux-next-20100305 with drm/radeon/kms, the LVDS panel of my laptop (Dell Studio 17) gets blank, and occasionally displays some brief artifacts when the KDM login screen supposed to pop up.

Maybe it needs some quirks (as Alex Daucher did for Dell Studio 15) ?
Comment 1 Alex Deucher 2010-03-06 09:26:48 UTC 
Does radeon.new_pll=0 fix it?
Comment 2 Damien Mir 2010-03-06 09:56:42 UTC 
(In reply to comment #1)
> Does radeon.new_pll=0 fix it?
> 

No it doesn't, same result.

Note that KMS with mainline 2.6.33 is OK. Seems to occur since recent merges in linux-next.
Comment 3 Alex Deucher 2010-03-06 15:08:11 UTC 
Can you attach the output of lspci -vnn and your video bios?  To dump your video bios do the following (as root):
cd /sys/bus/pci/devices/<pci bus id>
echo 1 > rom
cat rom > /tmp/vbios.rom
echo 0 > rom
Comment 4 Damien Mir 2010-03-06 19:28:48 UTC 
Created attachment 33822 [details]
requested vbios dump
Comment 5 Damien Mir 2010-03-06 19:30:02 UTC 
Created attachment 33823 [details]
lspci output
Comment 6 Damien Mir 2010-03-11 19:14:54 UTC 
Somehow I cannot reproduce with 2.6.34rc1, or even with next + glisse/drm-next.

I am closing the bug report.

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