Comment 35 for bug 2020782

Those logs from Xfce and Budgie look surprising to me. They don't prove that the DCV viewer/server bug doesn't exist there because they seem to have failed to turn on VNC-output-1. So the bug probably still exists in DCV viewer/server but hasn't been triggered yet. Maybe you need to select the 800x600 resolution mode explicitly instead of --auto?

The only relevant error messages in that last log are from the fractional scaling patch, where basically this is failing:

  xrandr --output VNC-output-0 --scale 1x1

which as mentioned above I thought was a bug in Xdcv and now in the proprietary NVIDIA driver too. But since the latter works, and we have been able to progress without fixing this, I think we can ignore those messages:

  Impossible to set scaling on crtc 65 to 1.000000, error id 2
  Window manager warning: Scalig CRTC 65 at 1.000000 failed

Also, the other messages in that last log are unrelated this bug. So basically the last log above (hopefully) contains no messages relating to anything we need to fix here. It does contain unrelated issues though: bug 1857392 and bug 2007742