Dom0 udev: disable unnecessary udev rules

[joanna]

Some of those rules report errors on startup (probably because they were created for older kernels), and potentially also slow down Dom0 boot. The rules that are particularly annoying:

1) 69-xorg-vmmouse.rules -- this one always displays the following error at boot:

udevd-work[798]: '/usr/bin/vmmouse_detect' unexpected exit with status 0x000b

2) 40-redhat.rules -- this one is responsible for the following error at boot:

udevd-work[814]: error opening ATTR{/sys/devices/system/cpu/cpu0/online} for writing: No such file or directory

Generally, other udev rules should be reviewed. Perhaps we would like to upgrade the udev package?

[joanna]

Ha! Actually, after I manually removed the above two udev rules (i.e. the whole 69-xorg-vmmouse.rules, and the "ACTION=="add", SUBSYSTEM=="cpu", KERNEL=="cpu[0-9]*", ATTR{online}="1"" from 40-redhat.rules) this solved all the "hanging udev" problems on my system, on both 3.2.7, as well as on 3.4.4 kernel.

So, bumping a priority of this task to Major.

[marmarek]

I believe that removing 69-xorg-vmmouse.rules is enough (it called some app on input devices). The line from 40-redhat.rules does nothing as there is no 'online' attr in this kernel.

​http://git.qubes-os.org/gitweb/?p=marmarek/core.git;a=commit;h=8b2be6b6934d263175a148d9ebf01e18b0bcea10