[Nouveau] Blank screen at startup (conflict with VESA VGA)

[Didier Spaier]

With the logs, this time. Sorry about that.

Didier Spaier wrote:
> Thansk for your answer, kernel logs are attached.
> 
> Please note that this time I tried with a 2.6.32.2 kernel (nouveau works 
> under X).
> 
> Marcin Slusarz wrote:
>> On Mon, Apr 05, 2010 at 10:59:40PM +0200, Didier Spaier wrote:
>>> Hi all,
>>>
>>> new to this list ;)
>>>
>>> I have a Lenovo Thinkpad T61. lspci|grep VGA says:
>>> 01:00.0 VGA compatible controller: nVidia Corporation Quadro NVS 140M 
>>> (rev a1)
>>>
>>> I have Slacware64-13.0 and Slackware64-current installed.
>>>
>>> Nouveau is modularized in all my kernels for -current.
>>>
>>> A problem arise even if I don't want to use nouveau under X: unless 
>>> nouveau be blacklisted in /etc/modprobe.d/blacklist.conf at startup,
>>> - when using one of the VESA modes at startup after a while screen 
>>> goes blank and I get a warning in syslog e.g:
>>>    Apr  2 18:58:56 darkstar kernel: fb: conflicting fb hw usage 
>>> nouveaufb vs VESA VGA - removing generic driver,
>>
>> It should work. Please provide full kernel log.
> 
> Kernel logs are attached for both cases. Unfortunately I don't see many 
> differences ??
> 
>>
>>> - no problem when using a VGA mode (text only),
>>
>> But Nouveau framebuffer activates without errors, right?
>>
> Yes, switching to nouveau framebuffer OK in the latter case but not in 
> the former
> 
>>> this disregarding which X driver I use afterwards (I always start in 
>>> console mode).
>>>
>>> But according to this page:
>>> http://nouveau.freedesktop.org/wiki/KernelModeSetting
>>> I thought nouveaufb shouldn't conflict with vesafb ? Am I wrong ?
>>>
>>> I tried with modules shipped in vanilla 2.6.33.1 as well as the last 
>>> Nouveau kernel repository pulled from git: no luck in both cases.
>>>
>>> I know there are easy workarounds: either use "VGA=ask", "VGA=ext" or 
>>> "VGA=normal" as a lilo.conf option or blacklist nouveau -- which 
>>> doesn't hurt anyway as nouveau will be loaded at X startup anyhow.
>>>
>>> But this is still is an annoyance for newcomers as when they are 
>>> trapped all they can do if they have a VESA mode in lilo.conf is 
>>> launch another system or live CD/DVD and either edit lilo.conf and 
>>> run lilo again or edit blacklist.conf to blacklist nouveau.
>>>
>>> But still, before kindly requesting Patrick Volkerding to blacklist 
>>> nouveau in -current for the time being, I wanted to now of another 
>>> way to go if possible.
>>>
>>> Thanks in advance for your answers,
>>>
>>> Didier
>>
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-- 
Didier Spaier
Gérant
EPSM
33 avenue Bosquet
75007 PARIS
T. 01 45 51 03 26 | M. 06 64 98 45 51
didier.spaier at epsm.fr | http://epsm.fr
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