Strange cursor redraws

[Owen Taylor]

On Mon, 2005-01-03 at 08:08 -0500, Daniel Veillard wrote:
>   I have noticed that my cursor get redrawed generating cursor image flicker
> even if I don't move the mouse or the underlying image doesn't change. It
> didn't depend on the application having the focus, or over which the cursor
> was drawn, but was depending on the cursor location on the screen. After a bit
> of checking it appears to be related to virtual screen, if the cursor is
> positionned at the x/y coordinate of a gnome-terminal whose content is
> scrolling but not displayed due to being on another virtual screen, then
> the cursor is redrawn as the terminal image is updated. Moving the cursor
> coordinate outside of the terminal area stops the flicker.
> 
>    Using xorg-x11 6.8.1-12, gnome-terminal-2.7.3-1, and metacity-2.8.6-2.1,
> hardware is Matrox 450 dual head running in xinerama mode.
> Excerps from /var/log/Xorg.0.log:
>   (--) PCI:*(1:0:0) Matrox Graphics, Inc. MGA G400 AGP rev 130,...
>   (--) Chipset mgag400 found
>   (**) MGA(0): Depth 16, (--) framebuffer bpp 16
>   (==) MGA(0): RGB weight 565
>   (II) MGA(0): Using XFree86 Acceleration Architecture (XAA)
> 
>   Does this qualify as a bug ? If yes what module is most likely to be guilty ?

Well, if your description is accurate, that would be an X server bug. It
sort of sounds like something is not checking whether a window is
visible
before hiding the software cursor when drawing on that window.

(I don't think the MGA handles alpha cursors, so the bluecurve cursor
theme will give you a software cursor.)

Regards,
						Owen


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