Karmic: Cups + usblp + segfault in libc-2.10.1.so

[phaidros]

I updated an AMD64 box to karmic recently. There was always a HP Laserjet 5P running on that machine (worked until the update).
It took me ages once to find out the correct device string (something like hal:/org/freedesktop/HAL/usb_no_serial_if0_serial (out of my head ..)), because the printer is connected via a usb2parallel adapter.

Following the Bugs regarding the move from hal to udev, I blacklisted usblp (which detected the printer somehow and created /dev/usblp0) as recommended. Afterwards neither lsusb nor lpinfo and all those tools detected the printer or the parallel/usb adapter anymore.

Now I once for testing loaded the usblp module again ang get these in kern.log:
[17980.160144] usb 3-1: usbfs: interface 0 claimed by usblp while 'usb' sets config #1
[17980.164615] usb[5266]: segfault at 7fff82f30000 ip 00007f4f1b94fb54 sp 00007fff82f2c178 error 4 in libc-2.10.1.so[7f4f1b8cd000+166000]
[18020.080092] usb 3-1: usbfs: interface 0 claimed by usblp while 'usb' sets config #1
[18020.084957] usb[5287]: segfault at 7fff374d4000 ip 00007f2a261b0b14 sp 00007fff374d1a28 error 4 in libc-2.10.1.so[7f2a2612e000+166000]
[18022.400169] usb 3-1: usbfs: interface 0 claimed by usblp while 'usb' sets config #1
[18022.404968] usb[5290]: segfault at 7fff76ae3000 ip 00007f8029decb54 sp 00007fff76ae00f8 error 4 in libc-2.10.1.so[7f8029d6a000+166000]
[18797.620766] usb 3-1: usbfs: interface 0 claimed by usblp while 'usb' sets config #1
[18797.625678] usb[6044]: segfault at 7fff7da28000 ip 00007f2c50828b54 sp 00007fff7da25a58 error 4 in libc-2.10.1.so[7f2c507a6000+166000]

Any idea to how to get that printer running again without hal backend?

[Irishbandit (irishbandit)]

https://bugs.launchpad.net/ubuntu/+source/cups/+bug/436495
Something in this bug report made me look at my config:
"Eventually after I figured out that /dev/usb/lp0 was missing, I loaded usblp, but even with that my printer is not detected anymore. So anyone who deleted the old configuration in the mean time to let it re-detect, will have a problem now. Something like "parallel:/dev/usb/lp0" is not obvious to people not configuring printers each and every day."

So I tried loading a printer from sysyem>administration>printing add printer pick lpt#1 followed all the steps then when it was done right click on my new printer and in the device uri: add parallel:/dev/usb/lp0

It worked, I can print again.

lpinfo -v
serial serial:/dev/ttyS0?baud=115200
network socket
direct scsi
network http
network lpd
network smb
network beh
network ipp
direct parallel:/dev/lp0
direct hp
direct hpfax

ls -l /dev/usb/lp*
crw-rw---- 1 root lp 180, 0 2009-10-26 16:46 /dev/usb/lp0

ls -l /dev/bus/usb/*/*
crw-rw---- 1 root lp 189, 898 2009-10-26 16:46 /dev/bus/usb/008/003

sudo lsusb
Bus 008 Device 003: ID 1a86:7584 Unknown

Its not being detected but it is printing.

[phaidros (phaidros)]

OK, the hint with parallel:/dev/usb/lp0 and *not* blacklisting usblp helped.
printer is not detected, but prints :D

anways, everytime I plug it in the segfault in libc-2.10.1.so is logged. so,
printer is running, but still this is a bug.

[Irishbandit (irishbandit)]

Can confirm that there is still a segfault in libc-2.10.1.so.

[Irishbandit (irishbandit)]

With the updates of the last 2 weeks I have not seen this segfault since Nov-02-2009.

[kirovs (kirovs)]

My printer says not connected from time to time and surely I get the same thing:

[103899.257049] usb[29269]: segfault at 7fffebd86000 ip 00007f0905c8c324 sp 00007fffebd81b68 error 4 in libc-2.11.1.so[7f0905c05000+17a000]
[103901.159029] usb[29306]: segfault at 7fffe83fb000 ip 00007effb936e324 sp 00007fffe83f79a8 error 4 in libc-2.11.1.so[7effb92e7000+17a000]
[103903.085005] usb[29346]: segfault at 7fffaee3d000 ip 00007f206c2eb2e4 sp 00007fffaee39118 error 4 in libc-2.11.1.so[7f206c264000+17a000]
[103904.975988] usb[29384]: segfault at 7fffa0495000 ip 00007f3bf5317324 sp 00007fffa0491bc8 error 4 in libc-2.11.1.so[7f3bf5290000+17a000]
[103906.896002] usb[29422]: segfault at 7fff2dd93000 ip 00007f341e40c324 sp 00007fff2dd90828 error 4 in libc-2.11.1.so[7f341e385000+17a000]

 uname -a
Linux kavarna 2.6.32-30-generic #59-Ubuntu SMP Tue Mar 1 21:30:46 UTC 2011 x86_64 GNU/Linux