Re: [gentoo-user] Kernel 3.7.9: Lots of devices are root root rw-------.

[Alan McKinnon <alan.mckinnon@gmail.com>]

On 23/02/2013 19:18, Alan Mackenzie wrote:
> Hi, Gentoo!
> 
> Just built the new kernel 3.7.9 last night, and it's one of these
> "nothing works" situations.
> 
> It seems the problems are with the device files, whose ownership is set
> to "root root" (rather than, e.g., "root audio") and whose permissions
> are set to crw------- (rather than the expected crw-rw----).
> 
> I'm still running udev-171-r10.  This might well make a difference.
> 
> Needless to say, everything works under kernel 3.6.11.  It would be nice
> if there were some mistake in my kernel config.
> 
> Could somebody help me get this fixed, please.


udev sets ownership and permissions on devices nodes, not the kernel.

I'd guess your udev setup is incompatible with 3.7.* so let's start with
the usual:

What is your kernel config for the various TMPFS settings in the kernel?
(grep TMPFS in .config)

What mount options apply to /dev?
Contents of /etc/fstab?
USE flags that apply to udev?

-- 
Alan McKinnon
alan.mckinnon@gmail.com