Blank Screen after update to 13.04

Question

I have a Dell XPS 12 with Intel Graphics. After update to 13.04 my screen stays dark after boot. When I attach an external monitor it works. But it takes several tries to swicht on the internal display of the notebook.

Can anybody help?

By tries do you mean you reboots? This might help, although I don't think it answers your question directly. — duxk.gh, Apr 27 '13 at 21:50

score 1 · Answer 1 · edited May 01 '13 at 13:02

1

Try brighten up the display with Fn+F5. It seems that the backlight is set to 0 during boot.

edited May 01 '13 at 13:02

Radu Rădeanu

169,590

answered May 01 '13 at 08:17

Uwe K.

11
1

What if I don't have a Fn key on keyboard? – Radu Rădeanu May 01 '13 at 08:28
full solutions is to edit /etc/default/grub and add "acpi_osi=linux acpi_backlight=vendor" so it looks like this: – Uwe K. May 01 '13 at 10:17
sorry, pressing Enter sent the comment – Uwe K. May 01 '13 at 10:17
... so it looks like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=linux acpi_backlight=vendor"
save file and update grub.conf with: sudo update-grub

reboot - should work now
– Uwe K. May 01 '13 at 10:18
Uwe, when I try your boot params my boot fails. Other suggestions? Note the Fn+F5 works. – Ray Jun 02 '13 at 00:47

score 0 · Answer 2 · edited Apr 13 '17 at 12:23

0

Thanks to this cool answer, I found another way to automatically set the screen brightness to a decent level at startup:

In /etc/rc.local, before "exit 0", write the following line:

echo 50 > /sys/class/backlight/acpi_video0/brightness

50 was my personal preference, you can set it to any value from 0 (blank) to 100 (highest)

edited Apr 13 '17 at 12:23

Community

1

answered Jul 05 '13 at 23:04

SylvainB

101
3

Blank Screen after update to 13.04

2 Answers2