ERROR Cannot find a backlight controller

Asked Jun 14 '15 at 07:10

Active Apr 01 '17 at 09:02

Viewed 1,538 times

So I just updated my kernel version on Ubuntu 15.04 64bit to Kernel 4.1.6 latest mainline. Now every boot of my laptop, I got this error.

starting version 219
_
...screen blink...

starting version 219
[ 15.450992 ] [drm:radeon_acpi_init [radeon]] *ERROR* Cannot find a backlight controller

But after I login into my desktop, seems fine. I can adjust my screen brightness very fine using keyboard shortcut.

Any advice on the error that pop-up on initial boot-up?

edited Sep 03 '15 at 22:10

asked Jun 14 '15 at 07:10

RoldanLT

I have the same. I hope someone can provide an answer soon. It spans across distros I'm afraid. Fedora, Antergos, all give the same error for me as well. – SNH Jun 18 '15 at 19:17
Same thing happen on 4.1.6. – RoldanLT Sep 03 '15 at 22:10

*ERROR* Cannot find a backlight controller

0 Answers0

ERROR Cannot find a backlight controller