[Nouveau] Blank screen at startup (conflict with VESA VGA)
pq at iki.fi
Mon Apr 5 15:43:38 PDT 2010
On Mon, 05 Apr 2010 22:59:40 +0200
Didier Spaier <didier.spaier at epsm.fr> wrote:
> 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,
This message is the expected behaviour. It is not an error.
It means the vesafb hand-over is working, or at least it
At what stage does the screen go blank? At X startup?
> - no problem when using a VGA mode (text only),
> this disregarding which X driver I use afterwards (I always start
> in console mode).
Are you trying to use nouveau.ko in kernel, and a non-Nouveau
X driver at the same time? That cannot work.
If nouveau.ko is loaded, the only option for X is to use
the nouveau driver (or perhaps fbdev). Any other driver,
e.g. "vesa" or "nv", will lead to trouble.
What kind of setup are you trying to run in this regard?
> But according to this page:
> I thought nouveaufb shouldn't conflict with vesafb ? Am I wrong ?
The hand-over should work: when nouveaufb initialises, vesafb
gets automatically deactivated.
In any case, complete kernel and X logs will help to diagnose
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