TV looses signal after last Endeavour update

Desktop Environments Gnome
1

I’ve been running Endeavour for about two years now on a small media PC connected to a living room TV, and it’s been working fine.

But since the last time I updated Endeavour (a few days ago), the TV does not get a signal when I switch to the PC.

The workaround I’ve found is to toggle HDR on or off via Connections. Then the signal comes back.

Anyone else noticed this? Anyone know what the issue may be?

2

Will probably be useful to see your hardware for anyone that’s going to respond.

inxi -FAZ --no-host | eos-sendlog

Without knowing anything else, my guess that it has something to do with a kernel update. So you could try installing the linux-lts kernel and booting from that.

3

Here’s the output:

https://0x0.st/PqO-.txt

I suspect that if I install the lts-kernel I will loose HDR support… we’ll see what happens first, the issue gets fixed or I loose patience constantly remoting into the machine to flip the switch to get the signal back. :sweat_smile:

4

I think I found an answer for you.

The person that reported it also has the solution to disable hdr, so it could be related to thisl. He reported this that with Gnome 49.3 and rolling back to Gnome 49.2 it fixes the issue. Maybe try that?

5

eobet: Just curious if that solve the problem?

Cphusion: That was a great find! I was really scratching on that problem. I have a TV media server but the way I pictured the problem was totally different. I may have given a different description though for this?

6

Perhaps I should clarify that my media PC is only connected to a TV, there is no other monitor connected to it. Also, I do not have a brightness issue, I have a complete loss of signal issue.

But at least it’s positive that it may be a Gnome related issue, because possibly that means that it will get a quicker fix than if it was a kernel issue.

7

I do not know how to downgrade Gnome, as I’m a beginner Linux user (I install, update and leave it running, pretty much). But hopefully it will be resolved in the next Gnome release so I can wait until then.

8

I know you don’t have brightness issue but you mentioned it was fixed by disabling HDR, which was the same fix for that person that reported that issue, so seems your issue and that issue both might be related to something with HDR.

You can try running the following.
sudo downgrade gnome-shell mutter

Then selecting gnome-shell 49.2 , I think it’s option 147 for gnome-shell and 184 for mutter. Then log out and back in or just reboot and then check if you have gnome 49.2 active.