| 1 |
On Sun, December 5, 2004 10:29 am, Holly Bostick said: |
| 2 |
> J. Patrick Campbell wrote: |
| 3 |
>> i'm on udev and have compiled in support for my webcam and video for |
| 4 |
>> linux |
| 5 |
>> yet my /dev/v4l and /dev/video0 are missing. |
| 6 |
>> sorry if someone already answered, my router locked up overnight so i've |
| 7 |
>> been bouncing email. |
| 8 |
>> how do i create devices with udev? didn't see anything on the gentoo |
| 9 |
>> udev |
| 10 |
>> guide. |
| 11 |
>> |
| 12 |
>> Thanks, |
| 13 |
>> |
| 14 |
>> ~P |
| 15 |
> |
| 16 |
> Inexpert suggestion; corrections gratefully accepted: |
| 17 |
> |
| 18 |
> Udev creates devices on the fly. This means that it creates the devices |
| 19 |
> when something calls for them to be created. |
| 20 |
> |
| 21 |
> The easiest way I find to create devices like this (devices which will |
| 22 |
> be used later, but are not "called" by anything during boot) is to make |
| 23 |
> the drivers for such devices modular rather than compiling them directly |
| 24 |
> in, and then adding them to /etc/modules.autoload.d/kernel-2.6; that |
| 25 |
> way, when the module loads, the device is created. This is how I get my |
| 26 |
> Sidewinder gamepad to work (creating the device /dev/js0), for example-- |
| 27 |
> if I compile support directly into the kernel, udev isn't running when |
| 28 |
> the driver is loaded, because the device is detected during an earlier |
| 29 |
> stage of the boot process, so no device is created. I suppose I could |
| 30 |
> create a device in the udev config, but I have no interest in that, |
| 31 |
> since it's not a "special device that udev doesn't know about" (which is |
| 32 |
> the situation in which you are supposed to specifically configure udev |
| 33 |
> to create a device). It's supposed to do it automatically; this way, it |
| 34 |
> does. |
| 35 |
> |
| 36 |
> I would suggest that you modularize your video devices as well. |
| 37 |
> |
| 38 |
> Hope this helps. |
| 39 |
> Holly |
| 40 |
> |
| 41 |
> -- |
| 42 |
|
| 43 |
Holly, |
| 44 |
|
| 45 |
Thanks for you reply. |
| 46 |
I don't know what'sup with my kernel 2.6.9r9 but i just recompiled 2.6.9r4 |
| 47 |
and all is working great. Cam is working again. |
| 48 |
The only problem i see is i got a clock skew error message when compiling |
| 49 |
the newer kernel so i wonder if that messed things up? Although make |
| 50 |
menuconfig showed the ibm cam drivers loaded, when i zcat /proc/config.gz |
| 51 |
it showed the driver not being there. So i'm sticking with the older |
| 52 |
kernel for now. |
| 53 |
|
| 54 |
Thanks, |
| 55 |
|
| 56 |
~P |
| 57 |
|
| 58 |
> gentoo-user@g.o mailing list |
| 59 |
> |
| 60 |
> |
| 61 |
|
| 62 |
|
| 63 |
-- |
| 64 |
http://patrickcampbell.us |
| 65 |
|
| 66 |
|
| 67 |
-- |
| 68 |
gentoo-user@g.o mailing list |
Archives