Ubuntu
linux package

  1. Bug #1885271
  2. Comment #0

Comment 0 for bug 1885271

Revision history for this message
gabriwinter (gabriwinter) wrote :

# 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