After going through all related questions (dozens of them), I still couldn't figure out.
system & hardware spec:
Lenovo Thinkpad P51, NVIDIA Quadro M2200 and Integrated Intel Graphic (hybrid graphic card),
Ubuntu 18.04 (dual boot with Win10)
symptom: When connected external monitor with HDMI port, no monitor detected.
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm 1920x1080 60.02*+ 60.01 59.97 59.96 59.93 48.00 1680x1050 59.95 59.88
lspci |grep HDMIoutputs nothing,
lspci |grep VGAgives the following:
00:02.0 VGA compatible controller: Intel Corporation Device 591b (rev 04)
intel(used to be
nvidia, but when installing
bumblebeeand avoid the infamous login loop, I switched to Intel.
- Nvidia Driver:
nvidia-driver-410with packages like
additional note: This worked before and still work on Win10 (dual boot), thus shouldn't be a hardware problem, but rather a config or hardware config one in the Ubuntu 18.04 system.