Red Hat Bugzilla – Bug 560284
Wrong characters rendered after refresh they look correct
Last modified: 2011-06-27 10:52:35 EDT
Description of problem:
I'm starting to notice occasionally/randomly wrong characters to be rendered
on my gnome-terminal window.
It looks like when the window is scrolled then proper characters reappear.
I cannot intentionally trigger the bug - but seems to occur from time to time.
Recently there were few upgrades in rawhide so it's hard to guess whether the problem is directly in gnome-terminal or in some rendering library.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Anything new here ?
I'm still seeing random character on my terminal from time to time and it is really confusing sometimes.
My actual version is:
Need at least a screenshot or something at least. I'm not a chiromancer (yet) :).
Created attachment 396506 [details]
gnome-terminal snapshot with incorrect characters
Ok - so here is something for your prophecy :)
I cannot really 'enforce' this behavior - so I could only take the picture when I notice some letter is wrong in terminal. The first XExpose event - i.e. refresh/redraw of that area with wrong text fixes the problem.
In fact - the problem could be character rendering in Xlib - as I start to assume your gnome-terminal has just one buffer for string rendering - and recently I've noticed 'similar' behavior in my own text editor (fte) - I've though it could be bug in my editor's code (as I've been changing some refresh/expose routines inside the editor) - but in fact it looks quite similar - refresh of text editor's window fixes the problem in the same way as for gnome-terminal.
So maybe after all the bug could be moved to Xlib - but I'm not sure about this yet.
Created attachment 396507 [details]
gnome-terminal after refresh with correct character
Correct letters after moving window over wrong characters to force windows area refresh.
Quite possibly an X driver bug. What driver are you using? Please reassign to the component for the driver.
This bug appears to have been reported against 'rawhide' during the Fedora 13 development cycle.
Changing version to '13'.
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