[Ubuntu] External (TV) Monitor gets no signal -> Ubuntu 20.04.2 LTS, i915

[mikethe1wheelnut]

An external (TV) monitor connected via hdmi doesn't get a signal. See the information provided. I'll add more as I continue my research..

output of:

lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.2 LTS
Release: 20.04
Codename: focal

output of:

lshw -c video

WARNING: you should run this program as super-user.
*-display
description: VGA compatible controller
product: HD Graphics 5500
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:51 memory:f6000000-f6ffffff memory:e0000000-efffffff ioport:f000(size=64) memory:c0000-dffff
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.

output of:

xrandr

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 309mm x 174mm
1920x1080 60.00*+ 59.97 59.96 59.93 48.00
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1440x900 59.89
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1360x768 59.80 59.96
1280x800 59.99 59.97 59.81 59.91
1152x864 60.00
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)
HDMI-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 885mm x 498mm
1360x768 104.59 +
1920x1080 60.00* 50.00 59.94
1920x1080i 60.00 50.00 59.94
1280x1024 60.02
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
800x600 72.19 75.00 60.32 56.25
720x576 50.00 50.00
720x576i 50.00
720x480 60.00 59.94 59.94
720x480i 60.00 59.94
640x480 75.00 72.81 60.00 59.94
720x400 70.08
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)

and a screen-shot of the display switcher:


Screenshot from 2021-04-06 19-45-48.jpg

I also know now that Fn+F8 are the hotkeys for switching display modes, but in this case, it has no effect.

..so.., how do I get a signal to the TV screen? Will keep researching, post the answer if I find it.. I've tried re-booting with the screen already plugged in.

Ok, I have a suspicion that the answer to this https://unix.stackexchange.com/quest...ized-but-black question is what I need. It looks like this monitor isn't programmed to accept hdmi input, even if it has a place to plug it in, so I'll need to get an html/vga adaptor..

[CelticWarrior]

Welcome.

Try selecting the HDMI input on the TV. It seldom is automatic. And make sure the resolution is supported.
This has nothing to do with Ubuntu.