The machine has an I7 2720QM cpu with the sandy bridge integrated graphics plus a Nvidia Quadro NVS4200M (optimus).
The BIOS allows to disable Optimus. This way you loose access to the integrated card and may use the nvidia card (I use the latest proprietary drivers). The problem with this setup is power consumption. Much greater than in Windows. With Optimus enabled in BIOS you can use the intel X drivers (if you block nouveau and nvidia drivers) but the power consumption is still there (the nvidia card is on). Also there are some problems in switching from X to console. In summary, a lot of good reasons to disable the nvidia card :-) Unfortunately, the acpi_call method does not work. It returns "failed" for all tests. Here is the relevant data: sudo dmidecode -s system-product-name Latitude E6420 sudo dmidecode -s system-version 01 lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller [0300]: nVidia Corporation Device [10de:1056] (rev a1) (prog-if 00 [VGA controller]) In attachment the DSDT.dsl How may I help? G. _______________________________________________ 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
