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 SDVO LVDS. > 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. - ajax
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