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ValveSoftware / steam-for-linux

Issue tracking for the Steam for Linux beta client
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Steam Big Picture won't launch in full-screen when using a custom desktop session #10651

Open amura11 opened 5 months ago

amura11 commented 5 months ago

Your system information

Please describe your issue in as much detail as possible:

I'm setting a desktop to launch directly into Steam big picture using a custom desktop session. When Steam launches it starts in big picture mode but it's not full-screen, it only fills a portion of the upper left hand side of the screen. Eg: PXL_20240321_161558707

I found by pressing Alt + Enter I get dropped out of big picture mode and when I start it again it will be full screen. If I log out and log back in I start to have inconsistent results. In some cases when logging back in Steam will remain in full-screen correctly but in other cases it will revert to partially filling the screen. I was having this issue on a Mint install and decided to try fresh with Ubuntu as that other install was a bit of a mess only to still have this issue. I have no idea why this is happening and why it's so inconsistent.

Below are the custom session and the script the custom session runs:

![PXL_20240321_161558707](https://github.com/ValveSoftware/steam-for-linux/assets/1559993/14f83985-0af2-48ff-baae-5fd54dc71b45)

[Desktop Entry]
Name=Steam Big Picture Mode
Comment=Start Steam in Big Picture Mode
Exec=/usr/local/bin/start-steam-big-picture
Type=Application
#!/bin/bash

xrandr --output HDMI-0 --mode 1920x1080

openbox-session &
steam -bigpicture

Notes The xandr is in there as the display connected is a 4k TV and Steam is unusable at 4k, probably due to a weaker CPU. Removing that line doesn't seem to make a difference. In one instance where I had that line removed the setup was all fullscreen but when I logged out and in again it was back to not filling the screen.

I've tried not using openbox-session and it seems to be worse. I haven't thoroughly tested this but without it the Alt + Enter trick doesn't seem to work at all.

Steps for reproducing this issue:

  1. Install a fresh version of Ubuntu
  2. Create the launch script as defined above
  3. Create the .desktop file as described above
  4. Install Steam sudo apt install Steam
  5. Create a test user
  6. From the login screen select the Steam Big Picture Mode session
amura11 commented 4 weeks ago

I came back to this and finally found a workaround. When trying to turn the windowed mode option on and off I noticed the window was the same size as the instance of steam in the picture above. I eventually found that setting steam to run fullscreen in openbox did the trick. I added this to my ~/.config/openbox/rc.xml

<applications>
    <application class="steam">
        <fullscreen>yes</fullscreen>
    </application>
</applications>

I'm not sure why this is needed. Could it be when the window is created it isn't being set to fullscreen in a way that openbox understands?