Bug 18234 (c51_lvds_script_fail)

Summary: c51 lvds script failure in randr12 mode. if I start the X server the screen is black and the framebuffer too because it trys to link the whole output to the monitor
Product: xorg Reporter: Thomas Schneider <maxmusterm>
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium CC: maxmusterm
Version: 7.3 (2007.09)   
Hardware: Other   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
randr12 enabled, blank/black screen xorg.log none

Description Thomas Schneider 2008-10-26 15:43:08 UTC 
I use a md98300 medion notebook with a nVidia Geforce Go 6150 graphic processor.
You have to change the BIOSLOG to work.
I will later add a few Xorg logs for debugging.
Comment 1 Stuart Bennett 2008-10-26 16:45:59 UTC 
Created attachment 19872 [details]
randr12 enabled, blank/black screen xorg.log

Attaching log posted to pastebin for posterity
Comment 2 Stuart Bennett 2008-10-26 17:07:56 UTC 
Issue can be worked around by worked around by turning call_lvds_script into a noop.

It is possibly suspicious that in doing dpms on at the end of the modeset, 0xD3BF: [ (0x56) - INIT_CONDITION_TIME ] does not successfully complete: "
0xD3BF: Condition still not met, skiping following opcodes". A comparison xorg log from darktama's C51 executing (almost) the same script does successfully complete.

Thomas: after nouveau has failed to start X, does the VT return, or does the screen remain blank until the laptop is rebooted?

Two other things to try:
1) does it work if the timeout is increased: in nv_bios.c, function init_condition_time(), change "BIOS_USLEEP(2000);" to "BIOS_USLEEP(20000);"
2) if 1) does not work, does it work if the off script is not run: again in nv_bios.c, function run_lvds_table(), just below "case LVDS_PANEL_OFF:" add "return;" on a new line.
Comment 3 Thomas Schneider 2008-10-26 17:19:31 UTC 
The Screen remains blank and black.
Yes even after closing X.And yes the framebuffer is black too.
Comment 4 Thomas Schneider 2008-10-26 17:26:03 UTC 
> Two other things to try:
> 1) does it work if the timeout is increased: in nv_bios.c, function
> init_condition_time(), change "BIOS_USLEEP(2000);" to "BIOS_USLEEP(20000);"
> 2) if 1) does not work, does it work if the off script is not run: again in
> nv_bios.c, function run_lvds_table(), just below "case LVDS_PANEL_OFF:" add
> "return;" on a new line.

I don't have to test the second way cause the first one works fine.
Thank you Stuart
Comment 5 Stuart Bennett 2008-10-27 12:55:33 UTC 
Fix based on 1) from comment 2 now pushed. Please test with a fresh git checkout, and close this bug if it is solved.
Comment 6 Thomas Schneider 2008-10-27 17:10:45 UTC 
Newest git works fine.
Thank you Stuart

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