Comment 5 for bug 921321

Hi Auke

Would you consider this as a regression ?

Looking at your stripped log I can see "ACPI backlight interface available, not registering our own", thus I would say that the issue is not related to nouveau

Although can you please try the following

1 Boot into runlevel 3
   Append " 3" to your kernel command line

2 Make sure that nouveau is not loaded - "lsmod" will tell you if it is
2.1 Possible solution - blacklist nouveau

3 Try to adjust the brightness via acpi
3.1 Look for *brightness* in /sys/devices/
   find /sys/devices -name "*bright*" 2>/dev/null

4 Suspend
   pm-suspend

5 Resume

6 Try to adjust the brightness again

7 Confirm/dismiss if it is a nouveau related issue

I hope it helps

Cheers,
Emil