udev and FB

udev and FB

[Vassilis Virvilis]

Hi,

although I watch this list rather closely, I have never seen mentioned
the FB subsystem. Is udev supposed to autoload it? I certainly understand
this is not desirable in most cases but it is in my case.

I looked around the debian rules and didn't find anything that blacklists
FB devices. So I am guessing that it requires rules in order to autoload it.
Is that true? Any other pointers to the right direction, for example similar
rules that happen to work ok for other type of hardware?

The rest of my hardware is correctly initialized, modules are autoloaded
and devices not are created.

     .bill


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Re: udev and FB

[Alexander E. Patrakov]

Vassilis Virvilis wrote:

> I looked around the debian rules and didn't find anything that blacklists
> FB devices.

You overooked this:

patrakov@home:~$ cat /etc/modprobe.d/display_class
# This directive blacklists all devices which are members of the display class.
# It has the main effect of stopping the udev/modprobe from loading the
# fb drivers.

# vendor, device, subsystem_vendor, subsystem_device, class, class, class
install pci:v*d*sv*sd*bc03sc*i* /bin/true

-- 
Alexander E. Patrakov



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Re: udev and FB

[Marco d'Itri]

On May 16, Vassilis Virvilis <vasvir@iit.demokritos.gr> wrote:

> although I watch this list rather closely, I have never seen mentioned
> the FB subsystem. Is udev supposed to autoload it? I certainly understand
Yes.

> this is not desirable in most cases but it is in my case.
Indeed, usually distributions do not want the fb drivers to be loaded.

> I looked around the debian rules and didn't find anything that blacklists
> FB devices.
/etc/modprobe.d/display_class

-- 
ciao,
Marco


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Re: udev and FB

[Vassilis Virvilis]

Alexander E. Patrakov wrote:
> 
> You overooked this:
> 
> patrakov@home:~$ cat /etc/modprobe.d/display_class
> # This directive blacklists all devices which are members of the display 
> class.
> # It has the main effect of stopping the udev/modprobe from loading the
> # fb drivers.
> 
> # vendor, device, subsystem_vendor, subsystem_device, class, class, class
> install pci:v*d*sv*sd*bc03sc*i* /bin/true
> 

Doh, indeed. However that means that udev calls modprobe and the modprobe
decides to not load the module right?

What I meant was that I looked at udev/etc/udev/debian/ of the udev src distribution.
I am doing embedded development and I don't have this file (directory actually).
Shouldn't it autoload the module in such a case?

Thanks anyway.

       .bill


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