Comment 22 for bug 910272

On 1/19/2012 3:56, Till Kamppeter wrote:
> This looks like a strange special case, as now even the usblp kernel
> module does not recognize the printer any more. So we need a much more
> systematic investigation now. Perhaps we have a very bad interference of
> instabilities of the adapter, the kernel and libusb. Now I need all
> combinations of systems and CUPS versions. You have two systems
> (internal and external driver) and two CUPS versions (PPA and proposed).
> This gives four combinations. Please test all four combinations, running
> this set of commands, naturally with the printer powered on and
> connected:
>
> sudo rmmod usblp
> lsusb
> ls -l /dev/bus/usb/*/*
> ls -l /dev/usb/lp*
> sudo /usr/lib/cups/backend/usb
> ldd /usr/lib/cups/backend/usb | grep usb
> lpinfo -v
> sudo modprobe usblp
> lsmod | grep usb
> ls -l /dev/usb/lp*
> for d in `ls -1 /dev/usb/lp*`; do sudo usb_printerid $d; done
> sudo rmmod usblp
>
> Post all the output (or attach as uncompressed text files).
>
> To do downgrades download all *.deb files of each package from
>
> https://launchpad.net/ubuntu/+source/cups
>
> and
>
> https://launchpad.net/~till-kamppeter/+archive/ppa/+packages
>
> into separate directories (one per version) and do
>
> sudo dpkg -i *.deb
>
> in the appropriate directory to install the desired version.
>
Clarification - There are three Ubuntu 11.10 systems involved in the
testing.

System A - (w8-FJ463AAR-ABA-a6528p); installed on an external hard
drive; running on an HP6600 machine; first to be involved, and the only
system to have the cups ppa version installed prior to the proposed version.
System B - (w8u-iomega); installed on a second external hard drive; also
running on the same HP6600 machine as System A.
System C - (w8-Aspire-5000; a laptop); installed on the internal hard
drive along with XP and Linux Mint.

Testing 19Jan2012
1. System B (cups proposed installed); requested info collected in file
named "SysB_cups1.5.0-8ub7_prop.txt".
2. Attempted to revert System B to cups ppa version without success;
documented in file 91072_SysB_Revert.txt.
3. System C (cups proposed installed); requested info collected in file
named "SysC_cups1.5.0-8ub7_prop.txt".
4. Attempted to revert System C without to cups ppa version success;
documented in file 91072_SysC_Revert.txt.
5. System A (cups ppa version) printing tested; printed successfully.
Requested info collected in file named "SysA_cups1.5.0-8ub7_ppa.txt".
Installed cups proposed version through Update Manager. Attempted to
print test file without success. Requested info collected in file named
"SysA_cups1.5.0-8ub7_prop.txt".
6. Some screen shots collect along the way are attached.

Comment - If I can determine how to get the ppa version installed on
Systems B and C I will collect and submit the requested data. These
installations are not currently involved in critical operations so can
tolerate some abuse by a mostly novice.