Comment 0 for bug 554099

Binary package hint: linux-image-generic

$ uname -a
Linux phoenix 2.6.32-19-generic #28-Ubuntu SMP Wed Mar 31 17:46:20 UTC 2010 i686 GNU/Linux

$ cat /proc/version_signature
Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1

$ lsusb
03f0:201d Hewlett-Packard <-- HP un2400 Mobile Broadband Module (QDL interface)

HP un2400 mobile broadband modem stopped working after i upgraded to lucid.
I can not load firmware anymore to my modem's Qualcomm Gobi USB chip using gobi_loader.
http://www.codon.org.uk/~mjg59/gobi_loader/

There was no problems on previous Ubuntu version (Karmic, kernel 2.6.31*). As i understand all devices based on this chip will not work on lucid, if this will not be fixed.

HP un2400 is recognized by kernel's qcserial module. qcserial.c was not changed from 2.6.31 to 2.6.32.
After searching internet i found that this is related to changes in the kernel's usbserial module:
"The qcserial driver is currently broken in 2.6.32 and later. It's due to the switch to using kfifo for usb serial, but we haven't been able to work out the actual cause. I'm looking at alternative approaches."
Source: http://mjg59.livejournal.com/120577.html

Contact me if You need additional information.