I am also logging into my Thinkpad Twist via SSH (with "-X" option to be
able to use X apps) and indeed this influences whether I can log in. If
I am able to log in directly on my laptop's screen, I am able to log in
again and again as long as I do not log in via SSH. If I log in via SSH
from another machine while I am logged in on the laptop's own screen and
then log out on the laptop's screen I cannot log in again on the
laptop's screen. To be able to log in again, I have to log out of the
SSH session and log in again via SSH, after that I can log in again on
the laptop's screen.
My .Xauthority file is most probably the culprit. The laptop's screen is
DISPLAY :0, the SSH session has DISPLAY :10 (see DISPLAY variable in
terminal). The .Xauthority file has up to three lines. Most is
unreadable binary data, all contain "till-twist" (the host name of the
laptop) near the beginning, some binary bytes, a number, some more
binary bytes, "MIT-MAGIC-COOKIE-1", and more binary bytes. In a healthy
(I can log in from the laptop's native screen) .XAuthority all lines
have different numbers, usually 0, 10, 11 in arbitrary order, or there
are only two lines, also with different numbers out of 0, 10, and 11. A
broken (I cannot log in) .Xauthority contains two lines with the number
10 and one with 11.
** Also affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Changed in: xorg (Ubuntu)
Importance: Undecided => Critical
** Changed in: xorg (Ubuntu)
Status: New => Confirmed
** Changed in: xorg (Ubuntu)
Milestone: None => ubuntu-13.10
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1228570
Title:
Login often fails
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1228570/+subscriptions
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