panning makes the mouse cursor jump
Submitted by Samuel Thibault @sthibaul
Assigned to Xorg Project Team
Description
Created attachment 106200 Xorg log
Hello,
On my intel card, I have an external monitor (VGA1) and an internal monitor (LVDS1). I'm using VGA1 at full resolution to show the whole screen, and the LVDS1 to show a zoomed version of the screen, using this xrandr command:
xrandr --output VGA1 --auto --output LVDS1 --auto --mode 640x480 --panning 1920x1080+0+0/1920x1080+0+0/100/100/100/100
Panning works as expected, but when the mouse cursor acts oddly when actually panning. That can be easily seen by using a fullscreen xpaint or gimp caneva, and trying to draw the diagonal of the LVDS1 screen in the caneva. While in the corner, everything is good. Then when panning starts happening, the cursor gets briefly displayed about 30x30 too low and to the right. Using
xrandr --output VGA1 --auto --output LVDS1 --auto --mode 640x480 --panning 1920x1080+0+0/1920x1080+0+0/320/240/320/240
i.e. permanent panning, makes using the mouse really difficult. I have attached the Xorg log
Samuel
Attachment 106200, "Xorg log":
Xorg.0.log
Version: 7.7 (2012.06)