Resolution issues after power cycling TV

Plex Players Desktop Players
1

Server Version#: 1.29.0.6244 (via Linuxserver.io Docker container)
Player Version#: Plex-HTPC 1.27.1
OS: Ubuntu 22.04.1 LTS
Hardware: NUC 11 NUC11PAHi7 w/ Intel Iris XE graphics
Display: LG OLED55B8PUA

I’ve been running Plex-HTPC on my media PC largely without issue, but in the past few weeks I’ve been having issues with resolution when turning the TV back on. I’ll only see the top quarter or so of the screen and everything will be very large like it’s stretching that portion to fill up 4K. The issue is fixed by closing and reopening Plex-HTPC, but that requires me to dig out my keyboard and hook it up (I use a Harmony remote). I’ve modified the snap file to set DISABLE_WAYLAND=1 in the environment, but otherwise it should be vanilla.

2

Hello.
I notice that there was a fix for linux power management a couple of months ago. Also what you refer to reminds me of resolution switching. We should at least get Plex HTPC logs zipped in your reply.

What are your HTPC Settings for

  • Experience → Screen Saver
  • Experience → Screen Saver type
  • Video → Enable Resolution Switching

What sort of state are you leaving the TV and the HTPC in?
Are you using an IoT outlet that cuts power to the TV?
Does your TV automatically want to turn on to do pixel maintenance?
Are you leaving HTPC paused during playback?
Does the issue persist if you Esc out to an HTPC Home and then leave it there?

What are the gory details about your Ubuntu power management?

3

I’ve got the screen saver disabled and resolution switching enabled.

What sort of state are you leaving the TV and the HTPC in?

The TV is off, the media PC is left on (it hosts PMC and a few other services).

Are you using an IoT outlet that cuts power to the TV?

Nope.

Does your TV automatically want to turn on to do pixel maintenance?

I don’t think so? If so, it certainly wouldn’t be happening with the frequency I’ve encountered this issue.

Are you leaving HTPC paused during playback?

Sometimes, but not when the problem has occurred.

Does the issue persist if you Esc out to an HTPC Home and then leave it there?

I’m not sure what you mean.

I’ll add logs the next time the issue appears.

4

Try to experiment with Resolution Switching disabled. Your TV would remain in the 4K state and upscale the image. Would you prefer to avoid that?

HTPC behaves in a creative way with Resolution Switching on.
Sleep / wake / screensaver has to occur cleanly on Ubuntu, Plex, the ATV, and the LG.

5

Unfortunately fullscreen does not work well on Linux. The app already has a hack to detect the screen change, indicated by the log Detected a fullscreen size change, working around by toggling fullscreen and back in 1s where it will toggle out of fullscreen, wait, and toggle back in. This appeared to correct the issue you are describing in all the cases I had seen. Is this log line present in your logs?

6

Hasn’t happened in a bit. Perhaps the latest update fixed it. I’ll report back if I see it again.

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