Thanks for the bug report.  We have reviewed the information you have provided above, and there is some additional information we require that will be helpful in our diagnosis of this issue.

Please attach your X server config file (/etc/X11/xorg.conf) and X server log file (/var/log/Xorg.*.log) to the bug report as individual uncompressed file attachments using the bugzilla file attachment link below.

Could you please also try to run without any /etc/X11/xorg.conf whatsoever and let X11 autodetect your display and video card? Attach to this bug /var/log/Xorg.0.log from this attempt as well, please.

Could you also run command

xev >xev-log.txt 2>&1 & 

in your terminal emulator (xterm,gnome-terminal,konsole) and then press Alt+<key>? Would you please attach xev-log.txt to this bug as the attachment as well?

We will review this issue again once you've had a chance to attach this information.

Thanks in advance.

This bug is a duplicate of bug 467539.

May I mark it as duplicate or only the assignee can do that ?

possibly duplicate of bug 467636?

*** This bug has been marked as a duplicate of bug 467539 ***