[Intel-gfx] Where is SDVO mode setting code in kernel module sources?
ajax at redhat.com
Wed Oct 19 08:02:46 PDT 2011
On Wed, 2011-10-19 at 18:43 +0400, 4ernov wrote:
> And is it guessed somewhere in case of VBT missing?
Well, not yet, no. Like I said, there's no code at all yet for tweaking
> In my case there's
> no OpRegion support (i945GME chipset don't support it as mainboard
> manufacturer informed)
This is, at best, stretching the truth.
> thus there're only "*ERROR* VBT signature
> missing" and "failed to find VBIOS tables" messages printed and I
> think the module doesn't use VBT after this.
I suppose in this case you'd have to hope that the SDVO init code at
POST time set up the device correctly, so that if you called
SDVO_CMD_GET_LVDS_PANEL_INFORMATION it'd tell you the truth. But that
assumes that the SDVO init code does that, and it might not, I don't
actually know; Intel doesn't release the docs for that publicly (or even
under NDA unless you're an OEM).
That or we'd need to add a way of passing in a VBT from the kernel
command line, like ACPI DSDT override does.
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