https://bugs.freedesktop.org/show_bug.cgi?id=108031
--- Comment #2 from Alexander Schlarb alexander-fd@xmine128.tk --- Created attachment 143205 --> https://bugs.freedesktop.org/attachment.cgi?id=143205&action=edit 4.19.0 Debian kernal boot log (external screen working)
I can reproduce this with
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Carrizo (rev c4) 03:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Bonaire XT [Radeon R9 M280X] (rev 80)
on a “Lenovo ideapad Y700-ACZ”.
When I boot into the released Linux 4.19.0 from Debian I get a blank screen, however today I discovered that if you have an external displayed plugged during boot-up that display will be successfully enabled and you can then log in as usual. The internal laptop display will not ever be enabled however and checking under *Systemsettings* → *Monitor Settings* (KDE) will not show it either. Also the entire system will feel very sluggish (not CPU or disk related, I checked) and is only usable with lots of patience. On shutdown the system will then hang (nothing about this in system logs unfortunately).