Re: Control Display Driver on Bootup
On Sat, 17 Sep 2011 21:16:32 +0200, Sven wrote in message
<[🔎] 87fwjvasj3.fsf@turtle.gmx.de>:
> On 2011-09-17 20:21 +0200, David Baron wrote:
>
> > Is there a way, using a bootup command or option, i.e. setting some
> > env, that can control whether I use nouveau or nvidia drivers. Some
> > startup script would need to
> >
> > 1. Copy or remove nouveau blacklist on /etc/modprob.d
> > 2. Copy appropriate xorg.conf version to xorg.conf
>
> 3. Ensure that the right libGL.so.1 and libglx.so are in place (for
> nouveau you need the versions from libgl1-mesa-glx
> resp. xserver-xorg-core, for nvidia you need NVidia's versions).
>
> > Would be even better if this could be handled within the two files
> > themselves.
>
> I think this could be handled via parsing /proc/cmdline in an
> initscript, looking for parameters like "nomodeset" or
> "nouveau.modeset=0". Those render nouveau useless, so you don't even
> need to do 1., assuming nouveau is _not_ blacklisted by default.
>
> For 2. this is a matter of copying or symlinking the right file, and
> 3. can be achieved with "update-alternatives --set glx" in wheezy/sid,
> assuming you have installed the Debian nvidia packages.
>
> Still quite some hassle, unfortunately.
>
> Sven
>
>
..and you have 0. put one stanza for each boot option to get
a nouveau and a Nvidea boot option in your Grub bootup menu?
That way also allows one boot command for each, and you might
even to use a different runlevel for each driver, e.g. to help
debug them.
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