#941884 bbswitch-dkms: bbswitch is broken

Package:
bbswitch-dkms
Source:
bbswitch
Description:
Interface for toggling the power on NVIDIA Optimus video cards (dkms)
Submitter:
Celejar
Date:
2019-10-07 03:00:06 UTC
Severity:
important
#941884#5
Date:
2019-10-07 02:56:38 UTC
From:
To:
bbswitch seems completely broken on my system. On boot, it loads, and
first reports:

bbswitch: disabling discrete graphics

but immediately follows this with:

bbswitch: Succesfully loaded. Discrete card 0000:08:00.0 is on

# cat /proc/acpi/bbswitch
0000:08:00.0 ON

# tee /proc/acpi/bbswitch <<<OFF
OFF

and syslog shows some sort of stack trace (see attached), and
/proc/acpi/bbswitch remains ON