(In reply to comment #25)

The pci-id of the VGA Controller is 01:00.0 for my Amilo.

However, I cannot apply the patches to the 3.14.18-100.fc19 kernel:

patch --dry-run -p1 <
~/software/0001-drm-radeon-add-a-module-parameter-for-backlight-cont.patch
checking file drivers/gpu/drm/radeon/radeon.h
Hunk #1 FAILED at 106.
1 out of 1 hunk FAILED
checking file drivers/gpu/drm/radeon/radeon_drv.c
Hunk #1 FAILED at 181.
Hunk #2 succeeded at 237 with fuzz 2 (offset -26 lines).
1 out of 2 hunks FAILED
checking file drivers/gpu/drm/radeon/radeon_encoders.c
Exit 1

patch --dry-run -p1 <
~/software/0002-drm-radeon-add-a-backlight-quirk-for-Amilo-Xi-2550.patch
checking file drivers/gpu/drm/radeon/radeon_encoders.c
Hunk #1 FAILED at 173.
1 out of 1 hunk FAILED
Exit 1

Which kernel should I use to test the patches?

Daniel