Dell Latitude E6420 test_off.sh succeeds in acpi_call: \_SB.PCI0.PEG0.VID._OFF
screen goes blank lspci: 00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller [0300]: nVidia Corporation GF108 [Quadro NVS 4200M] [10de:1056] (rev a1) (prog-if 00 [VGA controller]) with Optimus enabled in BIOS, Xorg with nvidia (binary) driver fails to start: [ 7302.936] (--) NVIDIA(0): Connected display device(s) on NVS 4200M at PCI:1:0:0 [ 7302.936] (--) NVIDIA(0): none [ 7302.938] (EE) NVIDIA(0): No display devices found for this X screen. full ACPI tables attached here: https://bugs.launchpad.net/lpbugreporter/+bug/752542/+attachment/2166441/+files/Latitude%20E6420.tar.gz
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