drm-nvidia-switch git branch but still vgaswitcheroo not working for i915/nvidia (nouveau) on ASUS U30JC

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Hello.

In my double-carded ASUS U30JC (nvidia + intel i915) I do the following:

stop X

This is the output of /sys/kernel/debug/vgaswitcheroo/switch

daphne linux # cat /sys/kernel/debug/vgaswitcheroo/switch
0: :Pwr:0000:01:00.0
1:+:Pwr:0000:00:02.0 (intel graphic card in use, ok)

echo "DDIS" > /sys/kernel/debug/vgaswitcheroo/switch does not change
the output above (intel remains marked as active)

echo "OFF" > /sys/kernel/debug/vgaswitcheroo/switch

seems to switch off Nvidia card, because the output above becomes:
0: :Off:0000:01:00.0
1:+:Pwr:0000:00:02.0

restarting X completely freezes the machine, black screen (need to power down
by
pressing the power button).


ASUS U30JC Nvidia (nouveau) + intel i915.

Kernel 2.6.35
x11-base/xorg-server 1.9.2.902
x11-drivers/xf86-video-nouveau 0.0.16_pre20101010

Shutting down the Nvidia graphic card via acpi_call
https://github.com/mkottman/acpi_call
produces the same freeze after trying to restart X.

Same problem with kernel 2.6.36 and acpi_call.
Did not try vga switcheroo on 2.6.36 due to problems with that kernel

https://bugzilla.kernel.org/show_bug.cgi?id=24542

echo "OFF" > /sys/kernel/debug/vgaswitcheroo/switch

produces in dmesg:

Dec  8 00:06:18 daphne kernel: VGA switcheroo: switched nouveau off
Dec  8 00:06:18 daphne kernel: [drm] nouveau 0000:01:00.0: Disabling fbcon
acceleration...
Dec  8 00:06:18 daphne kernel: [drm] nouveau 0000:01:00.0: Unpinning
framebuffer(s)...
Dec  8 00:06:18 daphne kernel: [drm] nouveau 0000:01:00.0: Evicting buffers...
Dec  8 00:06:18 daphne kernel: [drm] nouveau 0000:01:00.0: Idling channels...
Dec  8 00:06:18 daphne kernel: [drm] nouveau 0000:01:00.0: Suspending GPU
objects...
Dec  8 00:06:19 daphne kernel: [drm] nouveau 0000:01:00.0: And we're gone!
Dec  8 00:06:19 daphne kernel: nouveau 0000:01:00.0: PCI INT A disabled
Dec  8 00:06:19 daphne kernel: nouveau 0000:01:00.0: power state changed by
ACPI to D3

which seems to be correct.

The crash taking place when restarting X does not leave any trace on dmesg.



2010/12/13 Dave Airlie <airlied at gmail.com>:
- Ocultar texto citado -
> On Sun, Dec 12, 2010 at 12:05 AM, Giacomo <delleceste at gmail.com> wrote:
>> Hello.
>>
>> In my double-carded ASUS U30JC (nvidia + intel i915) I do the following:
>
> You might want to try the branch in my drm-testing repo
>
> http://git.kernel.org/?p=linux/kernel/git/airlied/drm-testing.git;a=shortlog;h=refs/heads/drm-nvidia-switch
>
> Has much improvements for gpu switching on intel/nvidia.
>
> Dave.
>

The branch code does not solve the situation:

both

echo "DDIS" > /sys/kernel/debug/vgaswitcheroo/switch

and

echo "OFF" > /sys/kernel/debug/vgaswitcheroo/switch

hang the machine.

The first command hangs immediately, the second at X restart.

DMESG out in the first case:

Dec 21 22:46:10 daphne kernel: fbcon: Remapping primary device, fb0, to tty 1-63
Dec 21 22:46:10 daphne kernel: calling mux switch 0
Dec 21 22:46:10 daphne kernel: mux switched 0
Dec 21 22:46:10 daphne kernel: ACPI Error: Needed
[Buffer/String/Package], found [Integer] ffff880146f23420
(20101013/exresop-590)
Dec 21 22:46:10 daphne kernel: ACPI Exception: AE_AML_OPERAND_TYPE,
While resolving operands for [OpcodeName unavailable]
(20101013/dswexec-460)
Dec 21 22:46:10 daphne kernel: ACPI Error: Method parse/execution
failed [\_SB_.PCI0.GFX0._DSM] (Node ffff880147c6d1c8),
AE_AML_OPERAND_TYPE (20101013/psparse-537)
Dec 21 22:46:10 daphne kernel: ACPI Error: Method parse/execution
failed [\_SB_.PCI0.PEG1.GFX0._DSM] (Node ffff880147c83830),
AE_AML_OPERAND_TYPE (20101013/psparse-537)
Dec 21 22:46:10 daphne kernel: failed to evaluate _DSM: 12291
Dec 21 22:46:10 daphne kernel: vga_switcheroo: switching failed stage 2 12291

-- here need to press power button to force shutdown ---

Second case (echo "OFF"...):

Dec 21 22:43:44 daphne kernel: VGA switcheroo: switched nouveau off
Dec 21 22:43:44 daphne kernel: [drm] nouveau 0000:01:00.0: Disabling
fbcon acceleration...
Dec 21 22:43:44 daphne kernel: [drm] nouveau 0000:01:00.0: Unpinning
framebuffer(s)...
Dec 21 22:43:44 daphne kernel: [drm] nouveau 0000:01:00.0: Evicting buffers...
Dec 21 22:43:44 daphne kernel: [drm] nouveau 0000:01:00.0: Idling channels...
Dec 21 22:43:44 daphne kernel: [drm] nouveau 0000:01:00.0: Suspending
GPU objects...
Dec 21 22:43:45 daphne kernel: [drm] nouveau 0000:01:00.0: And we're gone!
Dec 21 22:43:45 daphne kernel: nouveau 0000:01:00.0: PCI INT A disabled
Dec 21 22:43:45 daphne kernel: nouveau 0000:01:00.0: power state
changed by ACPI to D3

starting X hangs the machine immediately.

Let me know if I can help more.

Hope to hearing from you soon, Giacomo, Italy.

-- 
Giacomo S.
http://www.giacomos.it

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