Comment 24 for bug 1635447

The newest kernel, 4.8.0-32, behaves just like the other 4.8.0 versions.
Ubuntu never starts up.

After I've tried in vain to start with Linux 4.8.0-xx, and then starts
with 4.4.0-45, the following errors are printed:

[ 2.511733] usb 4-3: string descriptor 0 read error: -22
[ 3.841872] [drm:radeon_scpi_init [radeon]] *ERROR* Cannot find backlight controller
/dev/sda7: clean, 807007/9363456 files, 7364300/37423360 blocks
[ 21.335117] usb 4-3: string descriptor 0 read error: -22

When a successful start has not been immediately preceded by a failed start,
only the line beginning "/dev/sda7" is printed.