Comment 766 for bug 752542

dmesg:
<code>
[ 2.193654] ACPI: Video Device [PEGP] (multi-head: yes rom: no post: no)
[ 2.193733] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:4f/LNXVIDEO:00/input/input4
[ 2.193798] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
[ 2.194045] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:01/input/input5
[ 2.194070] [drm] Initialized i915 1.6.0 20150327 for 0000:00:02.0 on minor 0
[ 2.205672] fbcon: inteldrmfb (fb0) is primary device
[ 3.111542] Switched to clocksource tsc
[ 4.283638] Console: switching to colour frame buffer device 240x67
[ 4.291055] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 4.291057] i915 0000:00:02.0: registered panic notifier
[ 4.319418] bbswitch: version 0.8
[ 4.319423] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.GFX0
[ 4.319427] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG0.PEGP
[ 4.319439] bbswitch: failed to evaluate \_SB_.PCI0.PEG0.PEGP._DSM {0xF8,0xD8,0x86,0xA4,0xDA,0x0B,0x1B,0x47,0xA7,0x2B,0x60,0x42,0xA6,0xB5,0xBE,0xE0} 0x100 0x0 {0x00,0x00,0x00,0x00}: AE_NOT_FOUND
[ 4.319444] bbswitch: failed to evaluate \_SB_.PCI0.PEG0.PEGP._DSM {0xA0,0xA0,0x95,0x9D,0x60,0x00,0x48,0x4D,0xB3,0x4D,0x7E,0x5F,0xEA,0x12,0x9F,0xD4} 0x102 0x0 {0x00,0x00,0x00,0x00}: AE_NOT_FOUND
[ 4.319450] bbswitch: failed to evaluate \_SB_.PCI0.GFX0._DSM {0xA0,0xA0,0x95,0x9D,0x60,0x00,0x48,0x4D,0xB3,0x4D,0x7E,0x5F,0xEA,0x12,0x9F,0xD4} 0x102 0x0 {0x00,0x00,0x00,0x00}: AE_NOT_FOUND
[ 4.319451] bbswitch: No suitable _DSM call found.
[ 4.407194] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:SYNM] at 0x60,0x64 irq 1,12
[ 4.411293] i8042: Detected active multiplexing controller, rev 1.1
[ 4.413147] rtsx_pci 0000:04:00.0: rtsx_pci_acquire_irq: pcr->msi_en = 1, pci->irq = 29
[ 4.413519] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 4.413577] serio: i8042 AUX0 port at 0x60,0x64 irq 12
[ 4.413616] serio: i8042 AUX1 port at 0x60,0x64 irq 12
[ 4.413647] serio: i8042 AUX2 port at 0x60,0x64 irq 12
[ 4.413677] serio: i8042 AUX3 port at 0x60,0x64 irq 12
[ 4.414417] SCSI subsystem initialized
[ 4.414816] ACPI: bus type USB registered
--
[ 19.851827] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: data=ordered
[ 19.856024] EXT4-fs (dm-3): mounted filesystem with ordered data mode. Opts: data=ordered
[ 19.935656] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 19.938964] iwlwifi 0000:03:00.0 wlp3s0: renamed from wlan0
[ 20.640557] psmouse serio2: synaptics: queried max coordinates: x [..5692], y [..4680]
[ 20.783463] psmouse serio2: synaptics: Touchpad model: 1, fw: 7.2, id: 0x1c0b1, caps: 0xd04733/0xa40000/0xa0000, board id: 0, fw id: 582762
[ 20.820878] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio2/input/input12
[ 20.824057] mousedev: PS/2 mouse device common for all mice
[ 21.571256] sha256_ssse3: Using AVX2 optimized SHA-256 implementation
[ 21.783799] EXT4-fs (dm-4): mounted filesystem with ordered data mode. Opts: (null)
[ 21.863745] bbswitch: version 0.8
[ 21.863750] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.GFX0
[ 21.863753] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG0.PEGP
[ 21.863764] bbswitch: failed to evaluate \_SB_.PCI0.PEG0.PEGP._DSM {0xF8,0xD8,0x86,0xA4,0xDA,0x0B,0x1B,0x47,0xA7,0x2B,0x60,0x42,0xA6,0xB5,0xBE,0xE0} 0x100 0x0 {0x00,0x00,0x00,0x00}: AE_NOT_FOUND
[ 21.863769] bbswitch: failed to evaluate \_SB_.PCI0.PEG0.PEGP._DSM {0xA0,0xA0,0x95,0x9D,0x60,0x00,0x48,0x4D,0xB3,0x4D,0x7E,0x5F,0xEA,0x12,0x9F,0xD4} 0x102 0x0 {0x00,0x00,0x00,0x00}: AE_NOT_FOUND
[ 21.863775] bbswitch: failed to evaluate \_SB_.PCI0.GFX0._DSM {0xA0,0xA0,0x95,0x9D,0x60,0x00,0x48,0x4D,0xB3,0x4D,0x7E,0x5F,0xEA,0x12,0x9F,0xD4} 0x102 0x0 {0x00,0x00,0x00,0x00}: AE_NOT_FOUND
[ 21.863776] bbswitch: No suitable _DSM call found.
[ 22.092946] r8169 0000:04:00.2 enp4s0f2: link down
[ 22.094011] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 22.094282] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 22.316341] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 22.316598] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 22.773982] cfg80211: Calling CRDA to update world regulatory domain
[ 22.849621] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 22.919756] cfg80211: Calling CRDA to update world regulatory domain
[ 23.170206] cfg80211: Calling CRDA to update world regulatory domain
[ 25.607068] wlp3s0: authenticate with b0:00:b4:7c:c8:3e

</code>

uname -a:
Linux h4xx1.h4xx.local 4.1.0-1-mainline #1 SMP PREEMPT Thu Jun 4 17:03:35 CEST 2015 x86_64 GNU/Linux

Distribution:
Archlinux

xorg-server (1.17.1-5)
xf86-video-intel (2.99.917-5)
nvidia (352.09-1)
bumblebee (3.2.1-10)
bbswitch (0.8-1)