Resizing X frame is slow in Xubuntu when compositing is enabled
Bug #1385786 reported by
Toshio Ito
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
emacs24 (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
My environment:
- Xubuntu 14.04 (fresh installed)
- emacs24: 24.3+1-2ubuntu1
- xorg: 1:7.7+1ubuntu8
- Xorg driver: intel
Problem:
When "display compositing" is enabled, resizing X frame of Emacs is
slow, i.e., the frame cannot follow the cursor smoothly.
How to reproduce:
- Make sure "display compisting" is enabled.
$ xfce4-settings-
Select "Window Manager Tweaks"
Select "Compositor" tab
Check "Enable display compositing"
- Start Emacs in window mode
$ emacs -q
- Resize the Emacs frame by dragging the frame edge.
Workaround:
Disable display compisiting.
no longer affects: | xfwm4 (Ubuntu) |
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It seems that the emacs window is rather slow when redrawing its content. I did some testing in a virtual environment on a low end host system and every application window was showing the delayed resizing behavior. Enabling the built-in compositor increased the delay somewhat.