Red Hat Bugzilla – Bug 488411
Qt4 apps randomly & occasionally dropping key presses
Last modified: 2009-03-07 18:10:51 EST
I updated my system yesterday; I don't know if the Qt libraries were updated or maybe it was X11 stuff, but when I rebooted today I discovered that apps that use the Qt4 libraries, e.g., KMail, are "randomly" ignoring keypresses. For example, I write a mail and that all works but when I go to press Ctrl+Enter to send it, nothing happens. Then I try Alt+M,S but the Message menu won't pop-up. But then the next mail I send all the keypresses are accepted and everything works fine. I had the same effect in another Qt4 app (one of my own).
I don't know what can be done about it since the effect is so random. Maybe other people will notice and a pattern will emerge?
BTW I use GNOME as my window system, something KMail in particular doesn't seem over happy about.
Actually, it isn't as occasional as I first thought. KMail in particular is virtually unusable from the keyboard (which means unusable for me) because it just keeps ignoring keypresses. So maybe it is a KMail-specific problem (since it doesn't seem to be affecting other Qt4 apps at the moment)?
What version of Fedora are you using? Please fill in the version of Fedora, not Qt, under the "Version:" field.
Sorry, I'm using Fedora 10. (Although I know that from memory, don't know where Fedora actually says which version it is.)
And the problem is not with Fedora's Qt. I just built an app with my own local version of Qt and I have the same problem, only worse since practically all keypresses are being ignored. So maybe the problem is with a recent change in X11 or its drivers?
Hmmm, maybe the updated xorg-x11-drv-evdev?
Is there a way I can back out of that update to see if that's it?
Looks like the actual offender may be libgxim, see:
I'm not convinced. I use GNOME terminal and have no problems with it at all. Nor do I have problems with Firefox or other non-Qt4 apps.
I just did a yum update and got the new libgxim & rebooted. So far none of yesterday's problems have occurred, so I'll mark the bug as closed.
*** This bug has been marked as a duplicate of bug 488223 ***