hybrid-graphics-linux team mailing list archive

[Joakim Gebart <joakim.gebart@xxxxxx>]

Hello,
I've been experimenting with the asus-switcheroo module for a couple of
days now but so far I haven't had much success in switching outputs.
Any suggestions on what I should try next are welcome.

Below I will try to summarize everything I have tried and everything I
have found out about the U35JC for future reference:
This particular system is an Asus U35JC-RX040V: Geforce GT310 and i3-370M.
I have disassembled the DSDT and found that I have the MXMX, MXDS and
_DSM methods on both \_SB.PCI0.GFX0 and \_SB.PCI0.PEG1.GFX0.
asus-switcheroo loads correctly with the messages:
Found VGA device 0000:00:02.0 (\_SB_.PCI0.GFX0): IGD
Found VGA device 0000:01:00.0 (\_SB_.PCI0.PEG1.GFX0): DIS
Asus switcheroo: detected DSM switching method \_SB_.PCI0.PEG1.GFX0 handle
and the debugfs directory is created.
ON/OFF commands seem to be working, but whenever I try to switch to
discrete my console image freezes (not a blank screen as I read in
another mail on this list) but the system doesn't hang, I can blind type
echo IGD > /sys/kernel/debug/vgaswitcheroo/switch to get my console
back. If I try to start X when the screen is frozen it seems to be
starting correctly and I have managed to turn off X again and blind
switch back to IGD. The Xorg.log file then shows that the nouveau driver
is used when I start X blind, i915 otherwise. I don't currently have an
xorg.conf but looking at the log file it doesn't seem like I should need
one.
I read in another thread on this list that someone suggested testing
with an external monitor, I've tried both switching when having a VGA
monitor connected and connecting a monitor after switching to trigger
something in the nouveau driver, but still nothing. I added a small
printk to the nouveau driver to show when the reprobe is called and it
shows that it is being called when I switch.
Someone on this list suggested using the HDMI connector but I haven't
got an HDMI capable monitor here but I will try this when I get back
home next week if I don't find out anything before that.
I've tried using dummy_client=1 to get the binary nvidia driver working
but when I switch to DIS the whole system locks up, from this I haven't
been able to switch back and X doesn't start up (with a valid xorg.conf).
I also tried disabling modeswitch in the i915 driver but without
modeswitch the driver doesn't register a switcheroo client (just like
someone wrote on this list).
The system is Gentoo Linux ~amd64 and the kernel is 2.6.38-gentoo3 which
is based on 2.6.38.3 and contains just some small fixes for (irrelevant
in this case) stuff like CIFS and XEN, see
http://dev.gentoo.org/~mpagano/genpatches/patches-2.6.38-3.htm.
I don't use a ramdrive but I boot up to a recovery shell ( init=/bin/bb
) to test this to make sure I don't have anything else loaded that can
interfere with the switching.

Any suggestions?

Best regards,
Joakim