Fixing X220 Video The Right Way
John Baldwin
jhb at freebsd.org
Wed Feb 27 22:08:53 UTC 2013
On Wednesday, February 27, 2013 1:35:43 pm matt wrote:
> On 02/27/13 09:00, John Baldwin wrote:
> > If that is true, it's because your BIOS is lying. Do you have a URL to
> > your ASL lying around already?
> Too big for pastebin :( +500k
>
> https://docs.google.com/file/d/0B6YlMzJxarGbVnotLUdNWWNTVG8/edit?usp=sharing
Here is where I find _DOD and _DOS methods:
Device (PCI0)
Device (VID)
Name (_ADR, 0x00020000) // _ADR: Address
Method (_DOS, 1, NotSerialized) // _DOS: Disable Output Switching
Method (_DOD, 0, NotSerialized) // _DOD: Display Output Devices
Device (PEG)
Name (_ADR, 0x00010000) // _ADR: Address
Device (VID)
Name (_ADR, 0x00) // _ADR: Address
Method (_DOS, 1, NotSerialized) // _DOS: Disable Output Switching
Method (_DOD, 0, NotSerialized) // _DOD: Display Output Devices
PCI0.VID is a PCI device at pci0:0:2:0.
PCI0.PEG would be a PCI-PCI bridge at pci0:0:1:0.
It would have a child device at 0:0 that would be PCI0.PEG.VID. Does the X220
have a switchable GPU (e.g. it has built-in Intel graphics, but also has an
Nvidia GPU or some such?). If so, I imagine that PCI0.VID is the Intel graphics
and PEG is the non-Intel. The output of 'pciconf -lcv' would be useful to determine
that. If both PCI devices exist you shoudl have both acpi_video0 and acpi_video1.
However, it may be that the acpi_video driver doesn't cope well with having multiple
devices.
--
John Baldwin
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