[06:42] <Ecki> Half a year ago, I was fed up with windows and decided to install Xubuntu. I first tried a Live system of Focal Fossa, but couldn't use my printer, a HP Officejet Pro X451dw.
[06:42] <Ecki> I found out, that it worked well with Bionic Beaver, installed it and used it happily since then.
[06:42] <Ecki> Yesterday I decided to upgrade to Focal Fossa, because the support for Bionic Beaver will be cancelled soon, hoping that the problem might have been solved in the meantime.
[06:42] <Ecki> But unfortunately it was not. The system detects the printer, but I can't print and get the notification "printer not connected", which is not true. I disconnected and reconnected the USB cable to different USB slots, but the printer doesn't work anyway.
[06:42] <Ecki> I removed the printer and reinstalled it in the settings utility, but that didn't work. Finally I ran troubleshooting and got the following protocol:
[06:42] <Ecki>  [03/Mär/2021:08:17:11] io/hpmud/musb.c 427: Found interface conf=0, iface=0, altset=0, index=1
[06:45] <Maik> haven't you posted the same yesterday and got help Ecki?
[06:47] <Ecki> Yes, I did, but I can't find it. I thought, I was deleted, when I left this place.
[06:49] <Maik> since there's no one around (yet) with the knowledge to help, try asking on askubuntu
[06:50] <Ecki> Thank you. Can't we find an easy solution. Maybe I could use Focal Fossa, but install an older version of the printing program.
[06:52] <Maik> i'm not familar with such issues so i can't be of any help, sorry.
[06:53] <Ecki> Ok. I will stay here and hope, that someone comes by, who is an expert on the issue.
[07:22] <Ecki> I have asked the question at askxubuntu.
[07:24] <diogenes_> Ecki, maybe try a different distro just as a test and only if printer is crucial.
[07:34] <Ecki> Thank you. Printing can wait until after easter, but then it will be crucial again. What can I understand by a "distro"?
[07:36] <diogenes_> !distr
[07:36] <diogenes_> !distro
[07:37] <diogenes_> a distro is a different operating system that is based on Linux distro is short for distribution.
[07:37] <Ecki> Well, I could reinstall Bionic Beaver. But it might be dangerous using it after the support has run out.
[07:38] <diogenes_> yes but i mean other distros that are supported but which also include the older printer drivers.
[07:38] <diogenes_> anyways gtg for awhile.
[07:39] <Ecki> Thank you. I will wait for a couple of days and hope, that sombody can help me, before I install a different distirbutioen.
[15:07] <krytarik> Ecki: From what information you gave so far, it could be LP bug 1871011.  My mom was hit by it after upgrading from Bionic to Focal recently too - and we fixed it by the suggested workaround of removing the 'ippusbxd' package.
[15:10] <krytarik> Btw, by the time I got online yesterday, you were already gone, so.. >_>
[15:16] <Ecki> Thank you, now I have something to read and something to try. But I am not an expert and it sounds complicated.
[15:18] <krytarik> Well, the specific command we've used is just "sudo apt purge ippusbxd"
[15:18] <krytarik> And iirc we just rebooted afterwards to make the module go away.
[15:33] <Ecki> So I just enter this in the terminal and restart the computer?
[15:34] <krytarik> Yeah, just with your admin password in between.
[15:36] <krytarik> Could also try something like "sudo rmmod ippusbxd" first rather than rebooting though.
[15:38] <krytarik> Oh right, it's a service rather than just a module, and the suggested command would have been rather finicky to figure out properly..
[15:38] <krytarik> So yeah, just reboot.
[15:39] <Ecki> I have tried it and got an output including "the following packages have been removed: ippusbxd
[15:39] <Ecki> So I should have done it right, haven't I?
[15:44] <Ecki> I am going to reboot. Many thanks  for your help. I might come back, if it doesn't help or new problems occur.
[16:01] <Ecki> Hi, it's me again. I have tried to solve the problem, that my HP Officejet Pro X 451dw won't print under Focal Fossa, though it is detected and though it did under Bionic Beaver.
[16:01] <Ecki> You suggested to remove the package ippusbxd to avoid a conflict about USB channels:
[16:01] <Ecki> I ran 'sudo apt purge ippusbxd' and it produced an output containing "removed packages: ippusbxd'
[16:01] <Ecki> I then ran 'sudo rmmod ippusbxd' and it producet an output, that said ippusbxd is not installed.
[16:01] <Ecki> I rebooted the computer, but the problem continues. I can't print not even a testpage and get the notification: ' printer not connected', which still is as wrong as before.
[16:40] <krytarik> Ecki: Yeah, the fact that you can re-add the printer to the system defeats that claim.  Do you get any further error output than you already posted though?
[16:47] <Ecki> Wait a moment, I will run troubleshooting and show you the protocol.
[16:48] <krytarik> !paste
[17:03] <Ecki> It printed one testpage and no more and repeats: printer not connected
[17:03] <Ecki> Usually I could enter troubleshooting after trying to print a testpage, but this dialog doesn't open now.
[17:05] <Ecki> I have removed the printer again and reistalled it., hoping that I could enter troubleshooting this way, but I couldn't.
[17:33] <Ecki> I have sent 2 protocols of troubleshooting via  https://paste.ubuntu.com .
[17:49] <Ecki> I have sent a screenshot of my teminal after running 'sudo apt purge ippusbxd' and 'sudo rmmod ippusbxd' to imgur; https://imgur.com/a/2MVUSMD