cupsd locked up at roughly 80-90% in top with the remainder going to the
drivers. One printer (Epson Stylus C70) had been added on USB before. I was
going to configure an HP LaserJet 5L on lp0. gnome-cups-add hangs displaying
"reading driver database" for over 3 minutes (on a 1800 MHz Athlon). I did a
"/etc/init.d/cupsys stop". As I issued that command, gnome-cups-add continued
and showed me both printers were recognized, however, in the next step
(selecting the drivers) there was an empty list.
During the hanging, I extracted the following output:
5734 cupsys 16 0 4344 2120 1440 S 70.6 0.4 1:56.08 cupsd
5794 cupsys 25 0 9812 7752 716 R 23.5 1.5 0:27.14 cups-driverd
4526 root 15 0 99268 16m 7964 S 2.0 3.2 0:21.99 Xorg
[EMAIL PROTECTED]:/home/rich# strace -p 5794
Process 5794 attached - interrupt to quit
Process 5794 detached
[EMAIL PROTECTED]:/home/rich# strace -p 5734
...
select(1024, [0 1 2 4 5 6 9], [5 6], NULL, {1, 0}) = 2 (out [5 6], left {1, 0})
time(NULL) = 1150204917
time(NULL) = 1150204917
time(NULL) = 1150204917
...
repeated over and over.
[EMAIL PROTECTED]:/home/rich# lsof | grep 5734
[and then, out of a sudden, gnome-cups-add continued and allowed me to add the
printer, with cupsd at 3:24 cpu time. ]
5734 cupsys 15 0 4344 2120 1440 S 0.3 0.4 3:24.25 cupsd
Was that a coincidence, a heisenbug or did it actually require 800
billion operations to figure out what printers i might have...? On a
retry, it went rather quick (about 10 seconds) and seemed to work. But
IIRC, i have seen the hanging gnome printer discovery briefly on a
completely unrelated PIII-machine with an earlier version of cups (where
I was more concerned about the rip crashing like i reported in another
bug).
--
can't add printer, consumes 100% CPU
https://launchpad.net/bugs/44465
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