Well, I don’t really know XFCE in detail (I used it sporadically, but…) and I don’t use/know Thunderbird at all, but:
- check whether there’s a .desktop file that starts Thunderbird in ~/.config/autostart
- maybe XFCE has some Autostart or session restore feature, check its settings. Check whether Thunderbirds still runs and kill it before you logout.
- maybe there’s some setting in Thunderbird that turns on automatic start at login?
2 - I cannot start Firefox from XFCE. Terminal will start and can start Firefox, but only after several attempts.
What happens when it doesn’t start? Is there some error message in the terminal?
Are you sure it doesn’t start? Maybe it just takes long to start?
Try as a new user. Can you reproduce this behaviour there?
3 - Su no longer accepts the root password. Keyboard is working correctly.
If you haven’t changed the password, this might be a permissions issue.
Run “sudo chkstat” in a terminal, and post the output if you get some. (I hope sudo still works)
Can you login as root? I.e. is the password accepted in this case?
4 - I use install cd rescue system to create new password, but after reboot it is not accepted.
Which password now? Root’s or your user’s?
How did you change the password?
If you boot from the Install CD, your system is not running (not even your partition(s) are mounted). So if you just change a password, you don’t change that of your real system, only the one of the CD rescue system.
FWIW - I recall getting a strange email which I deleted without opening, if this could matter.
I can’t imagine how that would be related.
Unless this was a mail by your system telling you of some update problem or similar.
And just to be sure, please post your repo list:
zypper lr -d