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View Full Version : [ubuntu_studio] 18.10 upgrade: hdmi not in xrandr



spencer2
July 17th, 2019, 09:56 PM
I did an upgrade from 18.04 to 18.10 today & now my hdmi is not working.

xrandr Info:


xrandr
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
eDP-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
1366x768 60.03*+
1360x768 59.80 59.96
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
800x512 60.17
700x525 59.98
800x450 59.95 59.82
640x512 60.02
720x450 59.89
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
680x384 59.80 59.96
640x400 59.88 59.98
576x432 60.06
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
DP-1 disconnected (normal left inverted right x axis y axis)


lspci:


lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)



I've tried switching between gdm3 & lightdm with reboots & still nothing has changed. I see my video card so I don't think I need to reinstall it but am not sure what to do. Any ideas would be greatly appreciated: thank you.

ps- I have tried plugging into different external sources, each with their own cords - so its not a cord or monitor issue. It worked this morning when I woke up; but then after rebooting & upgrading -- this is not fixing the hdmi issue.

Pitero
July 27th, 2019, 08:54 PM
Hi,

Good approach basing on my experience is to always make backup before upgrade and if sth goes wrong to return to the previous version.

You haven't written if you have two graphics card (Optimus) or only one.

For me it looks there is sth wrong with gdm3 update.

You can try to look on the following links:

https://askubuntu.com/questions/1105332/external-monitor-not-working-ubuntu-nvidia
https://devtalk.nvidia.com/default/topic/1042774/nvidia-drivers-390-77-no-external-display-on-ubuntu-18-04-and-quadro-m1000m/?offset=24

It concerns nvidia cards and problems with external hdmi but perhaps you could do sth similar for your card. If you have two GPU, switching to nvidia and applying the given trick might be some kind of workaround until the problem is solved by ubuntu team.

If I didn't help to much, sorry for this. :(