# Steps to reproduce
# Working case
uname -a
Linux ubuntu 4.15.0-91-generic #92-Ubuntu SMP Fri Feb 28 11:09:48 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
lsusb -d 04e2:1411 -v > xr-usb-serial-devices.txt
lsusb -t >> xr-usb-serial-devices.txt
# Unbind 2 xr-usb-serial devices
echo '3-14.1' | tee /sys/bus/usb/drivers/usb/unbind
echo '3-14.3' | tee /sys/bus/usb/drivers/usb/unbind
dmesg > dmesg.txt
# Non working case
uname -a
Linux ubuntu 4.15.0-99-generic #100-Ubuntu SMP Wed Apr 22 20:32:56 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
lsusb -d 04e2:1411 -v > xr-usb-serial-devices.txt
<lsusb hangs here>
dmesg > dmesg.txt
This regression is almost certainly caused by one of the 2020-03-11 commits:
https://kernel.ubuntu.com/git/ubuntu/ubuntu-bionic.git/log/ubuntu/xr-usb-serial?h=Ubuntu-4.15.0-99.100&id=5966ed54d467fa77e7dbd7355177a5a6d1db7004
files attached in tar file.
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https:/ /wiki.ubuntu. com/Bugs/ FindRightPackag e. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.
To change the source package that this bug is filed about visit https:/ /bugs.launchpad .net/ubuntu/ +bug/1885271/ +editstatus and add the package name in the text box next to the word Package.
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