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Saturday, 12 June 2010

One more linux switchable methods that needs confirmation

One more that needs confirmation: Acer 5935g: http://launchpadlibrarian.net/50231929/DSDT.dsl


                                        If (LEqual (_T_2, One))
                                        {
                                            Store (0x1E, P80H)
                                            ^^PEGP.VGA._ON ()
                                            Store (0x1F, P80H)
                                            Return (GP18)
                                        }
                                        Else
                                        {
                                            If (LEqual (_T_2, 0x02))
                                            {
                                                Store (0x0E, P80H)
                                                ^^PEGP.VGA._OFF ()
                                                Store (0x0F, P80H)
                                                Return (GP18)
                                            }
                                        }

Please keep providing DSDT.dsl information in this bug report:
https://bugs.launchpad.net/bugs/312756
This is the list of calls to turn on/off the switchable graphics card in Linux so far:
status = acpi_get_handle(root_handle, "\\_SB.PCI0.P0P1.VGA._OFF", &handle);
status = acpi_get_handle(root_handle, "\\_SB_.PCI0.OVGA.ATPX", &handle);
status = acpi_get_handle(root_handle, "\\_SB_.PCI0.OVGA.XTPX", &handle);
status = acpi_get_handle(root_handle, "\\_SB.PCI0.P0P2.PEGP._OFF", &handle);
status = acpi_get_handle(root_handle, "\\_SB.PCI0.MXR0.MXM0._OFF", &handle);
status = acpi_get_handle(root_handle, "\\_SB.PCI0.PEG1.GFX0._OFF", &handle);
status = acpi_get_handle(root_handle, "\\_SB.PCI0.PEG1.GFX0.DOFF",
&handle);

If you haven't tried the switchable graphics feature in Linux yet, have a look at your DSDT.dsl file. With a bit of luck, you may be able to identify one of the methods above.
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