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

To: ubuntu-x-swat@xxxxxxxxxxxxxxxxxxx
From: Joerg-Volker Peetz <312756@xxxxxxxxxxxxxxxxxx>
Date: Tue, 28 Dec 2010 18:06:14 -0000
Reply-to: Bug 312756 <312756@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Trying to enable hybrid graphics on a HP Pavilion DV7-4142eg:

dmidecode -s system-product-name; dmidecode -s system-version
HP Pavilion dv7 Notebook PC
058B110000242B10000020100

lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA
01:05.0 VGA compatible controller [0300]: ATI Technologies Inc M880G [Mobility Radeon HD 4200] [1002:9712] (prog-if 00 [VGA controller])
02:00.0 VGA compatible controller [0300]: ATI Technologies Inc Manhattan [Mobility Radeon HD 5000 Series] [1002:68e0] (prog-if 00 [VGA controller])

Using a self-compiled kernel 2.6.36.2, the dmesg says

VGA switcheroo: detected switching method \_SB_.PCI0.AGP_.VGA_.ATPX
handle

but using the "acpi call" method results in kernel Oops

Please find attached the DSDT table.

By the way, it is not possible to change the display brightness via the
keyboard buttons for this purpose.

** Attachment added: "DSDT table"
   https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/312756/+attachment/1778226/+files/DSDT.dsl

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

Title:
  MASTER: support graphics card hot switch