Problem with blacklisting kernel modules with boot parameter

[Marcin Zajączkowski]

Hi,


I was playing with Fedora 16 Alpha and I've got a problem with Kernel
3.x and a camera in my laptop preventing me from installation [1].

The workaround seems to blacklist a uvcvideo kernel module, but because
it's an installation process and can't just add module to
/etc/modprobe.d/blacklist.conf (without a LiveCD customization).

I've read about rd.blacklist boot parameter [2] which should work
starting with Fedora 12 (as I understand it) [3], but in my case it doesn't.

I've tried with rd.blacklist=uvcvideo and blacklist=uvcvideo at boot
time, but uvcvideo is still loaded. Is there something else I've missed
or this could be a bug in Fedora 16 Alpha?


[1] - https://bugzilla.redhat.com/show_bug.cgi?id=734963
[2] - http://people.redhat.com/harald/dracut.html
[3] - http://fedoraproject.org/wiki/Features/Dracut


Regards
Marcin

[Marcin Zajączkowski]

On 2011-09-02 23:12, John Pilkington wrote:
-- 
http://solidsoft.wordpress.com/ - Working code is not enough

>  On 02/09/11 21:28, Marcin Zajączkowski wrote:
> > On 2011-09-02 22:06, Tom Horsley wrote:
> >> On Fri, 02 Sep 2011 21:43:53 +0200
> >> Marcin Zajączkowski wrote:
> >>
> >>> I've read about rd.blacklist boot parameter [2] which should work
> >>> starting with Fedora 12 (as I understand it) [3], but in my case it
> doesn't.
> >> I've always seen that spelled rdblacklist (no dot).
> > Thanks for your reply. I just tried it, but with no effect. What is more
> > I tried to blacklist some minor module on an another computer with
> > Fedora 14 using rd.blacklist, rdblacklist and blacklist - module was
> > loaded all the time.
> >
> > Could someone confirm that blacklisting at boot level really works for
> > him/her?
> >
> > Regards
> > Marcin
> >
>  In F12 the nVidia driver needed rdblacklist=nouveau on the kernel line.
>  
>  After two stages of preupgrade this no longer appears in my F14 
>  grub.conf    Not directly relevant but it did work in F12. 
Thanks for your reply.

I've found some explanation in the other bug in bugzilla [1]:
>  rdblacklist only prevents loading of the module in the rd=ramdisk. If
> you want
>  to prevent it to be loaded as soon as your root device is mounted, you also
>  have to do [add to /etc/modprobe.d/blacklist-xxx.conf] 
That could be a reason.

[1] - https://bugzilla.redhat.com/show_bug.cgi?id=611427

I will try to modify livecd.

Best
Marcin

[John Pilkington]

On 02/09/11 21:28, Marcin Zajączkowski wrote:
>  On 2011-09-02 22:06, Tom Horsley wrote:
> > On Fri, 02 Sep 2011 21:43:53 +0200
> > Marcin Zajączkowski wrote:
> >
> >> I've read about rd.blacklist boot parameter [2] which should work
> >> starting with Fedora 12 (as I understand it) [3], but in my case it doesn't.
> >
> > I've always seen that spelled rdblacklist (no dot).
>
>  Thanks for your reply. I just tried it, but with no effect. What is more
>  I tried to blacklist some minor module on an another computer with
>  Fedora 14 using rd.blacklist, rdblacklist and blacklist - module was
>  loaded all the time.
>
>  Could someone confirm that blacklisting at boot level really works for
>  him/her?
>
>  Regards
>  Marcin
>  
In F12 the nVidia driver needed rdblacklist=nouveau on the kernel line.

After two stages of preupgrade this no longer appears in my F14 
grub.conf    Not directly relevant but it did work in F12.

John P

[Marcin Zajączkowski]

On 2011-09-02 22:06, Tom Horsley wrote:
>  On Fri, 02 Sep 2011 21:43:53 +0200
>  Marcin Zajączkowski wrote:
>  
> > I've read about rd.blacklist boot parameter [2] which should work
> > starting with Fedora 12 (as I understand it) [3], but in my case it doesn't.
>  
>  I've always seen that spelled rdblacklist (no dot). 
Thanks for your reply. I just tried it, but with no effect. What is more
I tried to blacklist some minor module on an another computer with
Fedora 14 using rd.blacklist, rdblacklist and blacklist - module was
loaded all the time.

Could someone confirm that blacklisting at boot level really works for
him/her?

Regards
Marcin

[Tom Horsley]

On Fri, 02 Sep 2011 21:43:53 +0200
Marcin Zajączkowski wrote:

>  I've read about rd.blacklist boot parameter [2] which should
> work
>  starting with Fedora 12 (as I understand it) [3], but in my case it doesn't. 
I've always seen that spelled rdblacklist (no dot).