Launchpad Bug Reporter

  1. Bug #752542
  2. Comment #714

Comment 714 for bug 752542

Revision history for this message
O. (nonand2) wrote :

Hi, I got a Lenovo T440s (LENOVO-20AQCTO1WW) and something is going wrong... bbswitch is not able to turn off the discrete card and throws this error in dmesg:

ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140214/nsarguments-95)

followed by a stack trace. Full dmesg output (amongst other info) as attachment.

This laptop is running on latest Archlinux with kernel 3.15.7, bumblebee 3.2.1, Xorg 1.16.0.