In my Archlinux guest with xf86-video-qxl and spice-vdagentd, GDM as login manager adapts dynamically to the size of the sourrounding host window including taking up the native resolution of my screen when I select "Full screen" in virt-manager's viewer. As soon as I login into a plasmashell, this capability is lost and only the manually set fixed resolution in kscreen is used. Resizing the window won't change the guest's resolution anymore.
I may add that with xrandr the resolution change is visible: * before resizing the window [olaflostviking@kessel ~]$ xrandr Screen 0: minimum 320 x 200, current 1280 x 720, maximum 8192 x 8192 Virtual-0 connected primary 1280x720+0+0 0mm x 0mm 1280x720 59.86*+ 1920x1200 59.88 1920x1080 59.96 1600x1200 59.87 1680x1050 59.95 1400x1050 59.98 1280x1024 59.89 1440x900 59.89 1280x960 59.94 1280x854 59.89 1280x800 59.81 1152x768 59.78 1024x768 59.92 800x600 59.86 848x480 59.66 720x480 59.71 640x480 59.38 Virtual-1 disconnected Virtual-2 disconnected Virtual-3 disconnected [olaflostviking@kessel ~]$ * after resizing the window [olaflostviking@kessel ~]$ xrandr Screen 0: minimum 320 x 200, current 1280 x 720, maximum 8192 x 8192 Virtual-0 connected primary 1280x720+0+0 0mm x 0mm 1768x963 60.00 + 1920x1200 59.88 1920x1080 59.96 1600x1200 59.87 1680x1050 59.95 1400x1050 59.98 1280x1024 59.89 1440x900 59.89 1280x960 59.94 1280x854 59.89 1280x800 59.81 1280x720 59.86* 1152x768 59.78 1024x768 59.92 800x600 59.86 848x480 59.66 720x480 59.71 640x480 59.38 Virtual-1 disconnected Virtual-2 disconnected Virtual-3 disconnected [olaflostviking@kessel ~]$ Here you can see you X correctly "thinks" the preferred resolution is 1768x963.
Can I provide any more details or try out something different?
Still valid for 5.6.0.
Still valid for 5.6.1. (Do you even want updates on this bug report when I check out a new version? Or would it be better to keep the noise level low? :) )
mgraesslin had a look in bug #356864
Thank you for reporting this bug in KDE software. As it has been a while since this issue was reported, can we please ask you to see if you can reproduce the issue with a recent software version? If you can reproduce the issue, please change the status to "CONFIRMED" when replying. Thank you!
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!