Re: nouveau vs nvidia - fresh install, nouveau wins

On Wed, May 4, 2011 at 11:05 AM, Fedor Pikus <[email protected]> wrote:
> On Wed, May 4, 2011 at 1:13 AM, Axel Thimm <[email protected]> wrote:
>> On Wed, 2011-05-04 at 00:26 -0700, Fedor Pikus wrote:
>>> On Wed, May 4, 2011 at 12:11 AM, Axel Thimm <[email protected]> wrote:
>>> > On Tue, 2011-05-03 at 20:36 -0700, Fedor Pikus wrote:
>>> >> The NVidia RPM is configured to blacklist nouveau, which usually does
>>> >> the job of removing it. But recently I ran into the case where it does
>>> >> not work. It goes like this:
>>> >> 1) Do fresh install of F14 (may be others, but that's all I tried).
>>> >> 2) During install, configure F14 update repos
>>> >> 3) After install, add ATRPM repos and install NVidia drivers
>>> >>
>>> >> NVidia module does not load, lsmod shows that nouveau is there.
>>> >> Blacklist does not help, blacklisting nouveau on the boot line does
>>> >> not help,
>>> >
>>> > Have you tried nouveau.modeset=0?
>>>
>>> Yes, tried that and rdblacklist=nouveau. I think the problem is that
>>> initrd is built during the install and is configured for
>>> high-resolution text modes, and all modules in initrd are loaded even
>>> if they are later not used.
>>
>> I thought these commands would prevent the loading of nouveau from
>> initrd/initram.
>>
>> Try booting into mode 3 or mode 1 and see if the nouveau driver has been
>> loaded (lsmod | grep nouveau). BTW you need both the nouveau.modeset=0
>
> That's how I tracked it to initrd, I booted "single" and nouveau was
> there, that's before most things are loaded. Well, that, and removing
> nouveau.ko.
>
>> setting *and* the blacklisting at modprobe level, e.g. nouveau needs
>> blacklisting at two levels.
>
> When it's not in initrd, blacklist in modprobe.conf is sufficient.
> When it's in initrd, it just gets force-loaded on boot.
>
>>
>> I have the above kernel command line option and blacklist nouveau
>> in /etc/modprobe.d/nvidia.conf and didn't have a nouveau/nvidia clash
>> since ever.
>>
>>> So I may be able to rmmod nouveau if I disable graphical boot, and
>>> then load nvidia, but it requires manual intervention (and does not
>>> seem reliable, sometimes nouveau remains with refcount one even when
>>> lsmod shows no uses of it).
>> --
>> http://thimm.gr/ - http://ATrpms.net/
>>
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>
>
>
> --
> Fedor G Pikus ([email protected])
> http://www.pikus.net
> http://wild-light.com
>
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A long time ago, Axel posted instructions on rebuilding initrd, which
should (I believe) fix the issue. I can't find the commands now, but
perhaps Axel can repost the commands.  I think this is what finally
fixed the nouveau v nvidia issue for me.

Axel, any thoughts on this?

George