I checked latest xfce 4.13.3 in Fedora Core 30. I have notebook Dell Precision 3530 with Intel and NVidia cards. I'm using it with external display. Internal and external display has same dimensions, but different refresh rates.
If I use NVidia, xfce enables mirror button, but it selects last but highest resolution automatically. It works, but looks ugly. I can change resolution on both displays to highest (native for both displays) manually and it works fine. Therefore it looks there is some issue in resolution selection code.
If I use Intel (NVidia/nouveau is disabled), it enables mirror button and select correct (highest/native) resolution.
I didn't checked why there is observed difference and I can provide diagnostic/debug outputs if anyone interested in.
Hi,
I checked latest xfce 4.13.3 in Fedora Core 30. I have notebook Dell Precision 3530 with Intel and NVidia cards. I'm using it with external display. Internal and external display has same dimensions, but different refresh rates.
If I use NVidia, xfce enables mirror button, but it selects last but highest resolution automatically. It works, but looks ugly. I can change resolution on both displays to highest (native for both displays) manually and it works fine. Therefore it looks there is some issue in resolution selection code.
If I use Intel (NVidia/nouveau is disabled), it enables mirror button and select correct (highest/native) resolution.
I didn't checked why there is observed difference and I can provide diagnostic/debug outputs if anyone interested in.
Best regards,
Jirka Novak