Greetings, I have a Lenovo Thinkpad T401s with hybrid graphics (Intel 915 and nVidia NVS 3100M) running on Gentoo (tuxonice sources). I've searched about; however, I haven't seen any successful efforts to enable switchable graphics on a T410s. I'd be more than happy to test any efforts to get it going.
Per linux-hybrid-graphics.blogspot.com, I attempted the ACPI procedure call method outlined at http://linux-hybrid-graphics.blogspot.com/2010/07/using-acpicall-module-to-switch-onoff.html The acpi_call.ko module loads without error and produces the /proc/acpi/call entry. All of the calls in the test script report as 'failed'. I tried this both with VGA_SWITCHEROO enabled and disabled. I filtered my DSDT.dsl file ('grep -n -e Device -e Notify -e VGA -e AGP -e PCI -e '^^' -e DSM -e TPX DSDT.dsl'); however, I couldn't find any likely calls to try. The BIOS entries for the integrated graphics do seem to appear in the full DSDT.dsl output: Package (0x04) { "", "IntegratedGfx", "DiscreteGfx", "SwitchableGfx" }, Package (0x02) { "Automatic", "Disable" Note that the T410s has 2 BIOS entries for switchable graphics. The first selects the graphics source, and the second selects for automatic detection of OS's capable of supporting switchable graphics. I also tried to get switchable graphics using the kernel options per http://asusm51ta-with-linux.blogspot.com/. No amount of tinkering produced the vgaswitcheroo entry in /sys/kernel/debug, nor was I able to identify any relevant errors in dmesg or syslog. Thanks for all the work you folks are doing, Will Debug info is below: r...@blues acpi_call $ uname -a Linux blues 2.6.34-tuxonice-r1 #22 SMP Tue Jul 20 22:12:43 EDT 2010 i686 Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz GenuineIntel GNU/Linux r...@blues ~ $ lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation Arrandale Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller [0300]: nVidia Corporation Device [10de:0a6c] (rev a2) (prog-if 00 [VGA controller]) r...@blues ~ $ dmidecode -s system-product-name 2901CTO r...@blues ~ $ dmidecode -s system-version ThinkPad T410s DSDT.dsl output: http://burmashave.net/media/files/DSDT.dsl-23072010.txt kernel config: http://burmashave.net/media/files/config-23072010.txt _______________________________________________ Mailing list: https://launchpad.net/~hybrid-graphics-linux Post to : [email protected] Unsubscribe : https://launchpad.net/~hybrid-graphics-linux More help : https://help.launchpad.net/ListHelp
