This what I captured from dmesg.

PCI 02:00.0 is a 730 GTX w/1Gb DDR5
PCI 01:00.0 is a 960 GTX w/4Gb DDR5

Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: bios: version
84.06.26.00.2c
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: gr: using external
firmware
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: Direct firmware
load for nvidia/gm206/fecs_inst.bin failed with error -2
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: gr: failed to load
fecs_inst
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: disp: dcb 15 type 8
unknown
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: fb: 4096 MiB GDDR5
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: VRAM: 4096 MiB
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: GART: 1048576
MiB
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: TMDS table
version 2.0
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB version 4.1
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB outp 00:
01000f02 00020030
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB outp 01:
02000f00 00000000
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB outp 02:
04011f82 00020030
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB outp 03:
02022f62 00020010
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB outp 05:
02833f76 04400020
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB outp 06:
02033f72 00020020
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB outp 15:
01df5ff8 00000000
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB conn 00:
00001030
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB conn 01:
01000131
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB conn 02:
00010261
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB conn 03:
00020346
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: DCB conn 05:
00000570
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: Pointer to
flat panel table invalid
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: unknown
connector type 70
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: failed to
create encoder 1/8/0: -19
Apr 02 17:08:56 localhost kernel: nouveau 0000:01:00.0: DRM: Unknown-1 has
no encoders, removing
Apr 02 17:08:57 localhost kernel: nouveau 0000:01:00.0: DRM: MM: using COPY
for buffer copies
Apr 02 17:08:57 localhost kernel: nouveau 0000:01:00.0: DRM: allocated
1920x1080 fb: 0x60000, bo ffff88089ac02800
Apr 02 17:08:57 localhost kernel: nouveau 0000:01:00.0: fb0: nouveaufb
frame buffer device
Apr 02 17:08:57 localhost kernel: nouveau 0000:02:00.0: enabling device
(0000 -> 0003)
Apr 02 17:08:57 localhost kernel: nouveau 0000:02:00.0: NVIDIA GK208B
(b06070b1)
Apr 02 17:08:57 localhost kernel: nouveau 0000:02:00.0: bios: version
80.28.78.00.01
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: priv: HUB0: 086014
ffffffff (1f70820c)
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: fb: 1024 MiB GDDR5
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: VRAM: 1024 MiB
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: GART: 1048576
MiB
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: TMDS table
version 2.0
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: DCB version 4.0
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: DCB outp 00:
01000f02 00020030
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: DCB outp 01:
02011f62 00020010
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: DCB outp 02:
02022f10 00000000
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: DCB conn 00:
00001031
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: DCB conn 01:
00002161
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: DCB conn 02:
00000200
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: DRM: MM: using COPY
for buffer copies
Apr 02 17:08:58 localhost kernel: nouveau 0000:02:00.0: No connectors
reported connected with modes
Apr 02 17:08:59 localhost kernel: nouveau 0000:02:00.0: DRM: allocated
1024x768 fb: 0x60000, bo ffff88089a47c400
Apr 02 17:08:59 localhost kernel: nouveau 0000:02:00.0: fb1: nouveaufb
frame buffer device

Apr 02 17:09:01 localhost.localdomain kernel: mei_me 0000:00:16.0: enabling
device (0000 -> 0002)
Apr 02 17:09:01 localhost.localdomain kernel: snd_hda_intel 0000:01:00.1:
Disabling MSI
Apr 02 17:09:01 localhost.localdomain kernel: snd_hda_intel 0000:01:00.1:
Handle vga_switcheroo audio client
Apr 02 17:09:01 localhost.localdomain kernel: snd_hda_intel 0000:02:00.1:
Disabling MSI
Apr 02 17:09:01 localhost.localdomain kernel: snd_hda_intel 0000:02:00.1:
Handle vga_switcheroo audio client
Apr 02 17:09:02 localhost.localdomain kernel: snd_hda_intel 0000:00:1f.3:
failed to add i915 component master (-19)
Apr 02 17:09:02 localhost.localdomain kernel: e1000e 0000:00:1f.6:
Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
Apr 02 17:09:02 localhost.localdomain kernel: e1000e 0000:00:1f.6 eth1:
registered PHC clock
Apr 02 17:09:02 localhost.localdomain kernel: e1000e 0000:00:1f.6 eth1:
(PCI Express:2.5GT/s:Width x1) 00:1f:bc:0f:37:76
Apr 02 17:09:02 localhost.localdomain kernel: e1000e 0000:00:1f.6 eth1:
Intel(R) PRO/1000 Network Connection
Apr 02 17:09:02 localhost.localdomain kernel: e1000e 0000:00:1f.6 eth1:
MAC: 12, PHY: 12, PBA No: FFFFFF-0FF
Apr 02 17:09:03 localhost.localdomain kernel: e1000e 0000:00:1f.6
enp0s31f6: renamed from eth1
Apr 02 17:09:11 localhost.localdomain kernel: ahci 0000:00:17.0: port does
not support device sleep
Apr 02 17:09:29 localhost.localdomain kernel: e1000e 0000:00:1f.6
enp0s31f6: 10/100 speed: disabling TSO

On Fri, Apr 1, 2016 at 8:17 AM, <bugzilla-daemon@freedesktop.org> wrote:

> *Comment # 13 <https://bugs.freedesktop.org/show_bug.cgi?id=94725#c13> on
> bug 94725 <https://bugs.freedesktop.org/show_bug.cgi?id=94725> from Karol
> Herbst <freedesktop@karolherbst.de> *
>
> (In reply to Rashed Abdel-Tawab from comment #10 <https://bugs.freedesktop.org/show_bug.cgi?id=94725#c10>)> Created attachment 122654 [details] <https://bugs.freedesktop.org/attachment.cgi?id=122654> [details] <https://bugs.freedesktop.org/attachment.cgi?id=122654&action=edit>
> > dmesg using tentative fix
> >
> > Alexandre, using the tentative fix you uploaded it switches GPUs properly
> > now. Here is the dmesg from that since there are still some errors related
> > to power state in it. Also, for some reason lshw is returning this for the
> > nVidia GPU now:
> >
> > *-generic
> >                 description: Unassigned class
> >                 product: Illegal Vendor ID
> >                 vendor: Illegal Vendor ID
> >                 physical id: 0
> >                 bus info: pci@0000:01:00.0
> >                 version: ff
> >                 width: 32 bits
> >                 clock: 66MHz
> >                 capabilities: bus_master vga_palette cap_list rom
> >                 configuration: driver=nouveau latency=255 maxlatency=255
> > mingnt=255
> >                 resources: irq:129 memory:dc000000-dcffffff
> > memory:b0000000-bfffffff memory:c0000000-c1ffffff ioport:e000(size=128)
> > memory:dd000000-dd07ffff
> >
> > I don't know if that's related to this at all but before, if I set runpm=0
> > and run lshw, it would return the proper description (running it without
> > runpm would cause the system to hang)
>
> I have the same issue with bbswitch (and maybe vgaswitcheroo too). Basically
> this means that in d3cold we can't talke to the gpu and the information isn't
> cached or something like that.
>
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