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Old 09-02-2011, 07:43 PM
Marcin Zajączkowski
 
Default Problem with blacklisting kernel modules with boot parameter

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

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Old 09-02-2011, 08:06 PM
Tom Horsley
 
Default Problem with blacklisting kernel modules with boot parameter

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).
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Old 09-02-2011, 08:28 PM
Marcin Zajączkowski
 
Default Problem with blacklisting kernel modules with boot parameter

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

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Old 09-02-2011, 09:12 PM
John Pilkington
 
Default Problem with blacklisting kernel modules with boot parameter

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



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Old 09-02-2011, 09:43 PM
Marcin Zajączkowski
 
Default Problem with blacklisting kernel modules with boot parameter

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

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