Ubuntu
xserver-xorg-video-intel package

  1. Precise (12.04)
  2. Bug #855124
  3. Comment #31

Comment 31 for bug 855124

Revision history for this message
In , Eugeni Dodonov (eugeni) wrote :

Created attachment 51643
Patch to ignore non-existent i2c buses

Could you please try with this patch?

It should allow kernel to ignore non-existent i2c communication lines.

On my machine, the xrandr probing with this patch went from 4s to 0.366s.

To enable it, please also add the following line into /etc/modprobe.conf (or /etc/modprobe.d/i2c_algo_bit.conf file (creating it when necessary):

options i2c_algo_bit bit_test=1

Also, if it works (or if it does not works) for you, please paste the result of 'dmesg' with the patch applied.