Disabling the graphics card seems to trigger an ACPI hotplug event which
seems to remove the device from the system.
Could you prevent bbswitch from loading at boot (nvidia/nouveau should
not load either), then report the output of the following steps
including a dmesg log:
sudo modprobe bbswitch load_state=-1
lspci -nnvvd10de:
sudo tee /proc/acpi/bbswitch <<<OFF
lspci -nnvvd10de:
sudo tee /proc/acpi/bbswitch <<<ON
lspci -nnvv10de:
** Changed in: bbswitch (Ubuntu)
Status: New => Incomplete
** Changed in: bbswitch (Ubuntu)
Assignee: (unassigned) => Peter Wu (lekensteyn)
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https://bugs.launchpad.net/bugs/1318040
Title:
bbswitch prevents suspend and taints kernel
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