udev vs nvidia

Is :

alias char-major-195* nvidia

present in your /etc/modules.conf ?

Hi,

Since switching to udev, I have had problems when starting X relating to nvidia drivers. I know this is a tricky situation, with the nvidia drivers being closed-source, nobody really knows how they work. If it seems likely that this problem is not udev-related, then please tell me, and I will go to nvidia instead.

I'm not sure if this is even anything to do with udev. The only reason I suspect udev might be involved, is because of the existance of /dev nodes seems to play a part.

I am running nvidia drivers version 5336 with Martin Schlemmer's patch applied to make them export info into sysfs.
If I manually "modprobe nvidia", then I can see that the /dev/nvidia0 and /dev/nvidiactl nodes are created. So at this stage it seems to be loaded.

My theory is that X loads the "nvidia" module, and then immediately tries to initialize the display and whatever else. But as the nvidia* nodes arent in place, it dies.

I am running udev017 on linux 2.6.3-rc2-mm1

Any ideas?

cheers,

Daniel

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Hi,

Since switching to udev, I have had problems when starting X relating to nvidia drivers. I know this is a tricky situation, with the nvidia drivers being closed-source, nobody really knows how they work. If it seems likely that this problem is not udev-related, then please tell me, and I will go to nvidia instead.

I'm not sure if this is even anything to do with udev. The only reason I suspect udev might be involved, is because of the existance of /dev nodes seems to play a part.

I am running nvidia drivers version 5336 with Martin Schlemmer's patch applied to make them export info into sysfs.
If I manually "modprobe nvidia", then I can see that the /dev/nvidia0 and /dev/nvidiactl nodes are created. So at this stage it seems to be loaded.

Ignoring the above situation, on a normal bootup, the nvidia module is not loaded at the point where I "startx":

# ls /dev/nvidia*
no such file or directory

# startx
XFree86 Version 4.3.0
Release Date: 27 February 2003
[snip]
(=) Using config file: "/etc/X11/XF86Config"
Using vt 7
(EE) NVIDIA(0): Failed to initialize the NVIDIA kernel module!
(EE) NVIDIA(0):  *** Aborting ***
(EE) Screen(s) found, but none have a usable configuration.

Fatal server error:
no screens found

If I mknod the /dev/nvidia* nodes first, then X is able to start as normal. Also, strangely, if I "modprobe nvidia", and then "startx" then X starts as normal.

I believe that this problem comes around because the /dev nodes are not created quickly enough.

# modprobe nvidia && ls -l /dev/nv*
ls: /dev/nv*: No such file or directory

# rmmod nvidia

# modprobe nvidia && sleep 2 && ls -l /dev/nv*
crw-rw-rw-    1 root     video    195,   0 Feb 16 19:47 /dev/nvidia0
crw-rw-rw-    1 root     video    195, 255 Feb 16 19:47 /dev/nvidiactl

My theory is that X loads the "nvidia" module, and then immediately tries to initialize the display and whatever else. But as the nvidia* nodes arent in place, it dies.

If anyone is interested, I have solved the below issue. It turns out that you are supposed to load the module before starting X (even nvidia say so), and devfs did this automatically on bootup. So, the nvidia module should be added to an autoload list, and this issue is not a fault of udev/hotplug.

Daniel

Quoted 36 lines · Daniel Drake

Hi,

Since switching to udev, I have had problems when starting X relating to nvidia drivers. I know this is a tricky situation, with the nvidia drivers being closed-source, nobody really knows how they work. If it seems likely that this problem is not udev-related, then please tell me, and I will go to nvidia instead.

I'm not sure if this is even anything to do with udev. The only reason I suspect udev might be involved, is because of the existance of /dev nodes seems to play a part.

I am running nvidia drivers version 5336 with Martin Schlemmer's patch applied to make them export info into sysfs.
If I manually "modprobe nvidia", then I can see that the /dev/nvidia0 and /dev/nvidiactl nodes are created. So at this stage it seems to be loaded.

Ignoring the above situation, on a normal bootup, the nvidia module is not loaded at the point where I "startx":

# ls /dev/nvidia*
no such file or directory

# startx
XFree86 Version 4.3.0
Release Date: 27 February 2003
[snip]
(==) Using config file: "/etc/X11/XF86Config"
Using vt 7
(EE) NVIDIA(0): Failed to initialize the NVIDIA kernel module!
(EE) NVIDIA(0):  *** Aborting ***
(EE) Screen(s) found, but none have a usable configuration.

Fatal server error:
no screens found

If I mknod the /dev/nvidia* nodes first, then X is able to start as normal. Also, strangely, if I "modprobe nvidia", and then "startx" then X starts as normal.

I believe that this problem comes around because the /dev nodes are not created quickly enough.

# modprobe nvidia && ls -l /dev/nv*
ls: /dev/nv*: No such file or directory

Quoted 8 lines

# rmmod nvidia

# modprobe nvidia && sleep 2 && ls -l /dev/nv*
crw-rw-rw-    1 root     video    195,   0 Feb 16 19:47 /dev/nvidia0
crw-rw-rw-    1 root     video    195, 255 Feb 16 19:47 /dev/nvidiactl

My theory is that X loads the "nvidia" module, and then immediately tries to initialize the display and whatever else. But as the nvidia* nodes arent in place, it dies.

-------------------------------------------------------
SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and deploy apps & Web services for Linux with
a free DVD software kit from IBM. Click Now!
http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click
_______________________________________________
Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net
[email protected]
https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel