Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: lightdm (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1234400
Title:
Cannot log in users if their Xauthority file is corrupt.
Status in Light Display Manager:
Fix Released
Status in “lightdm” package in Ubuntu:
Fix Committed
Bug description:
Please backport the following patch to the 1.6 branch:
http://bazaar.launchpad.net/~lightdm-team/lightdm/trunk/revision/1803
Otherwise a user with corrupt .Xauthority file cannot log in. strace
lightdm shows:
21:48:35.028167 open("/home/thome/.Xauthority", O_RDONLY) = 8
21:48:35.028211 fstat(8, {st_mode=S_IFREG|0600, st_size=363, ...}) = 0
21:48:35.028242 read(8,
"\1\0\0\6cochon\0\00216\0\22MIT-MAGIC-COOKIE-1\0\20\222\233\376\354\240glg\36\20\274\30\305\37:$\1\0\0\6cochon\0\00214\0\22MIT-MAGIC-COOKIE-1\0\20p\301wy>G\327\275_\226\236m\375%\373\302\1\0\0\6cochon\0\00213\0\22MIT-MAGIC-COOKIE-1\0\20\344\243\t\305uKW\215\313J\254i\302\252\341P\1\0\0\6cochon\0\00212\0\22MIT-MAGIC-COOKIE-1\0\20\315\367G\372\211
\354\r\334\205\34\340-A\30\261\1\0\0\6cochon\0\00211\0\22MIT-MAGIC-COOKIE-1\0\20G\2265\331\224\345\225\267\254\5\302"...,
363) = 363
21:48:35.028275 close(8) = 0
21:48:35.028331 open("/home/thome/.Xauthority", O_WRONLY|O_CREAT, 0600) = 8
21:48:35.028357 close(8) = 0
21:48:35.028655 tgkill(1367, 1368, SIGRT_1) = 0
21:48:35.028729 futex(0x7fff7460bde0, FUTEX_WAIT_PRIVATE, 1, NULL) = 0
21:48:35.028819 setresuid(0, 0, 4294967295) = 0
21:48:35.028854 tgkill(1367, 1368, SIGRT_1) = 0
21:48:35.028968 setresgid(0, 0, 4294967295) = 0
21:48:35.028995 write(2, "Error writing X authority: Failed to write X
authority /home/thome/.Xauthority: Success\n", 88) = 88
21:48:35.029162 exit_group(1) = ?
21:48:35.029560 +++ exited with 1 +++
Best,
E.
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