I have a thin PC equipped with a Core i7-8550U on which I am running Debian 10 Buster.
The board uses Intel HD Graphics 620 and has a HDMI and a Display Port on board. No external graphics card. This board claims it can support up to 3 monitors.
I have one monitor (supporting only VGA and HDMI inputs) connected to the HDMI port which is perfectly fine. Since my monitor doesn't support DisplayPort, I purchased a DisplayPort to HDMI adapter. But I simply cannot get the second monitor recognized. I read someplace that the problem may be with the adapter being passive and I bought a second (supposedly) active adapter. I honestly have no way of telling if either of them are really active or passive. I'm just going by what the product claimed on amazon.
I have tried numerous things. I can't even recollect anymore the things I've tried or what driver state my machine is currently at.
Some things tried are
- with and without xserver-xorg-video-intel
- buster-backports firmware-misc-nonfree linux-image-amd64 firmware-linux firmware-linux-nonfree
- buster-backports xserver-xorg-video-intel
One other thing that I tried and failed at completely was drivers from
ppa:oibaf/graphics-drivers. Install wouldn't work because the repo was not PGP signed. I really did not put any more effort is fixing that issue.
No luck. I really don't know where I should be looking. here are
$ xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 XWAYLAND0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 480mm x 270mm 1920x1080 59.96*+ $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)
EDIT: I disabled wayland and the xrandr output now looks like this.. im just happy to see a hdmi-1 and dp-1 now showing up.. but i still cant seem to get any ouput on my second monitor via DP > HDMI connector + cable
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384 DP-1 disconnected (normal left inverted right x axis y axis) HDMI-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 1872mm x 1053mm 1920x1080 60.00*+ 50.00 59.94 30.00 25.00 24.00 29.97 23.98 1920x1080i 60.00 50.00 59.94 1680x1050 59.88 1600x900 60.00 1280x1024 60.02 1440x900 59.90 1280x800 59.91 1280x720 60.00 50.00 59.94 1024x768 60.00 800x600 60.32 720x576 50.00 720x576i 50.00 720x480 60.00 59.94 720x480i 60.00 59.94 640x480 60.00 59.94 720x400 70.08
Happy to provide any additional information to any kind souls out there who can help me get my dual monitor setup working. :)