11 Jan
2015
11 Jan
'15
4:44 p.m.
said Michele Calgaro:
| On 01/03/2015 07:53 AM, dep wrote:
| > said Gerhard Zintel: | On Friday 02 January 2015, dep wrote: | > said
| > Michele Calgaro: | > | On 12/28/2014 08:15 AM, dep wrote: | > | >
| > sorry to be such a bother, but as long as i'm bringing things up, | >
| > | > here's one that has been an issue for a couple of years and | > |
| > > survived into R14. | > | > | > | > my desktop crashes, but in such
a
| > way as to not even be noticeable | > | > at first. | > | > | > |
> i
| > have in lieu of wallpaper xplanet set up as a realtime moon | > | >
| > phase indicator, updating hourly. the way i tell the desktop has | > |
| > > crashed is that it doesn't update -- in this case it last | > | >
| > refreshed at 10:30 a.m. yesterday. i believe that i was probably | > |
| > > editing pictures at that time, though would not swear to it. | > | >
| > | > | > after it crashes, a right click on the desktop does not
| > produce | > | > the expected menu. as it happens, kicker and
| > everything else |
| >
| > > | > continues to function as expected -- in fact, it was just now
| > > | > that | > | > i noticed that the desktop itself
| >
| > had gone south. | > | > | > | > i thought i'd look in the x error
log,
| > bit i see that the one i | > | > have, ~/.xsession-errors, is of an
| > unspecified file type and won't | > | > open in a text editor (it
| > reports its size as 500.0 k). | > | > | > | > any idea if there's
a
| > log that might let me see what's going on | > | > here and if so what
| > log it might be? bonus points, how i might | > | > restart the desktop
| > without logging out and back in? extra bonus | > | > points, how i
| > might fix it so it doesn't do this anymore? i'm | > | > running some
| > flavor of ubuntu 12.04LTS -- i say some flavor | > | > because when i
| > sought to upgrade a few days ago the ubuntu | > | > upgrader refused,
| > citing third-party apps or a beta version of the | > | > opsys, or
| > something; it didn't specify. i thought i had bog | > | > standard
| > 12.04LTS on the machine but am apparently wrong. | > | | > | sorry for
| > the late reply.
| >
| > The desktop behavior is controlled by the | > | kdesktop process. When
your desktop stops updating, from CLI type:
| > | > | ps aux | grep desktop | > | and see if there is something like:
| > | > | | > | username 8414 0.4 0.7 260192
| >
| > 28956 pts/8 Sl 12:50 0:00 | > | kdesktop | > | > avahi 1973
| > 0.0 0.0 32308 1732 ? S 2014 0:01 | > avahi-daemon:
| > running [dep-desktop.local] | > dep 3200 0.0 0.1 252184 17972
| > ? Sl 2014 |
| >
| > > 1:04 /opt/trinity/bin/kdesktop | > dep 11289 0.0 0.0 0
| > > 0 ? Z 2014 0:02 | >
| >
| > [kdesktop_lock] <defunct> | > dep 29758 0.0 0.0 9388 904
| > pts/0 S+ 16:12 0:00 grep | > desktop |
| >
| > > | > nevertheless, it hasn't updated since 10:19:53 AM 26 December.
| > > | > and a | > rmb click on the desktop does not
| >
| > produce the expected menu. | > | > | If not, kdesktop has crashed. You
| > can type: | > | kdesktop & from CLI to restart it (or alternatively
| > Alt-F2 and then | > | kdesktop). | > | > dep@dep-desktop:~$ kdesktop
| > is already running! | > | > | If this brings everything back in order,
| > please let us know because | > | we need some more advanced testing to
| > understand why and where | > | kdesktop crashed. | > | > fwiw, top
| > reports 3 zombies. | | have you tried to kill the running kdesktop
| > beforehand (not the | defuncts)? I assume it runns under process
| > number 3200. Thus: | $ kill -9 3200 | | and than launch kdesktop
| > again?
| >
| > this worked. i do not know if we learned anything from its having
| > worked, but work it did.
| >
| > thanks!
|
| kdesktop_lock died and has not been reaped, so I suspect that kdesktop
| may be waiting on some unreleased mutex, which would be the reason why
| the background does not update any more and the RMB click doesn't do
| anything. Something obviously went wrong.
| The next time you see the error, can you try the following:
| 1) ps aux | grep kdesktop -> this should give again kdesktop_lock
| <defunct> 2) take note of the kdesktop pid (not the kdesktop_lock)
| 3) from CLI (not within TDE, but from a tty), run: gdb --pid=<pid of
| kdesktop> --> you may try from a TDE console, but you may loose the
| keyboard. In such case you have to switch to a tty, kill the gdb
| instance and retry from there. 4) type: thread apply all bt
| Report what is printed out. This hopefully will provide some additional
| info. If it is not critical for you, please do not exit gdb and do not
| kill and restart kdesktop. Depending on what we find, we may have to run
| some other commands.
|
| By the way, can you open a proper bug report on our bugszilla? It looks
| like there is something to fix here :-)
I shall create an account there and do so; it hath happened again. The
results from your instructions:
dep@dep-desktop:~$ ps aux | grep kdesktop
dep 11451 0.0 0.0 0 0 ? Z Jan08 3:19
[kdesktop_lock] <defunct>
dep 30334 0.0 0.1 252428 18252 ? Sl Jan02 4:55 kdesktop
dep 30724 0.0 0.0 9384 908 pts/0 S+ 11:37 0:00 grep
kdesktop
dep@dep-desktop:~$ gdb --pid=30334
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>.
Attaching to process 30334
Could not attach to process. If your uid matches the uid of the target
process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try
again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf
ptrace: Operation not permitted.
(gdb) thread apply all bt
(gdb)
so tried again as root:
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>.
Attaching to process 30334
Reading symbols from /opt/trinity/bin/kdesktop...(no debugging symbols
found)...done.
Reading symbols from /opt/trinity/lib/libtdeinit_kdesktop.so...(no
debugging symbols found)...done.
Loaded symbols for /opt/trinity/lib/libtdeinit_kdesktop.so
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symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libc.so.6
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found)...done.
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symbols found)...done.
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Loaded symbols for /usr/lib/x86_64-linux-gnu/libXfixes.so.3
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[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7f5c62de7700 (LWP 30339)]
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Loaded symbols for /usr/lib/x86_64-linux-gnu/liblcms.so.1
0x00007f5c6cca1feb in ?? () from /lib/x86_64-linux-gnu/libc.so.6
(gdb)
Not sure that this is overarchingly helpful . . .
Many thanks, as always.
--
dep
The shortest distance between you and playing great acoustic guitar:
the great new instructional DVDs from Marjorie Thompson,
available at www.MarjorieThompson.com