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[Bug 312756] Re: MASTER: support graphics card hot switch

To: ubuntu-x-swat@xxxxxxxxxxxxxxxxxxx
From: CB <312756@xxxxxxxxxxxxxxxxxx>
Date: Sat, 29 Jan 2011 17:01:02 -0000
Reply-to: Bug 312756 <312756@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Hello.

I have a Asus Eee PC 1015PN. I run Ubuntu 10.10, 32 bit. Here is the
file DSDT.dsl. I created this file when I used the ION nvidia chip.

On the site

https://wiki.ubuntu.com/HardwareSupport/Machines/Netbooks#Asus%20Eee%20PC%201015PN

a procedure is described using your ACPI stuff. I have tried this and
everything worked fine (reboot, optimus was visible, etc.). I attached
also a DSDT_ION+Optimus.dsl file with both graphic cards switched on.

However, I couldn't deactivate the nvidia chip at the end via the
command

echo "\_SB.PCI0.P0P4.DGPU.DOFF" > /proc/acpi/call

The system was frozen after 30 seconds. Has somebody an explanation?
Thanks in advance.

** Attachment added: "DSDT.dsl"
   https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/312756/+attachment/1815092/+files/DSDT.dsl

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https://bugs.launchpad.net/bugs/312756

Title:
  MASTER: support graphics card hot switch