https://bugzilla.kernel.org/show_bug.cgi?id=104791

Peter Wu peter@lekensteyn.nl changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |peter@lekensteyn.nl

--- Comment #6 from Peter Wu peter@lekensteyn.nl --- The problem is that nouveau_switcheroo_optimus_dsm() unconditionally calls function 0x1B ("NOUVEAU_DSM_OPTIMUS_FLAGS") without checking that this function is actually supported. Lenovo's firmware decides to run into an infinite loop in this case instead of returning an error code.

Proposed patch: https://lkml.kernel.org/r/1463244575-3515-1-git-send-email-peter@lekensteyn....