Arch Linux

jFl

Member

Registered: 2016-08-21

Posts: 1

Primary screen stopped working under 4.7

Hi,

I have a Samsung slate 7 tablet and have been running arch for almost three years now without
problems. Now, since the update to linux version 4.7 my internal screen stopped working.

I still see the grub menu but after that I only get a short blinking cursor and then a blank screen.

If I start linux with "nomodeset" the monitor works just fine (wrong resolution though) so its not a
problem of the hardware.

I've tried several suggestions I found here in the forums without any luck. I'm a little bit stuck
right now as I don't know how to debug this problem further.

xrandr shows a wrong resolution with a false rate:

Screen 0: minimum 320 x 200, current 2560 x 1080, maximum 8192 x 8192
LVDS1 connected 640x480+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   640x480       63.10*+  59.94

The actual resolution should be 1366x768@60Hz.

Here's what I've tried:

I disabled early KMS start, turned off/on all (recommended) kernel parameters for the i915 module
and went through the journal without any luck.

I am not shure what is wrong because I don't get an error message; the only thing that
seems a little bit strange to me is that the edid file for LVDS-1 device in

/sys/class/drm/card0-LVDS-1/

is empty.

My graphics card is a

lspci grep VGA

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

and I use the x86-video-intel driver.

Any ideas or pointers are highly appreciated.

Edit:

I forgot to mention that downgrading to 4.6 fixes this error.

Last edited by jFl (2016-08-22 11:13:47)