Hi all,

        I can confirm that the above configuration works with dell702X.sh 
script from Jos Hickson (
https://lists.launchpad.net/hybrid-graphics-linux/msg00663.html ) 

        Using kernel 2.6.38.2 and latest acpi_call.ko from the git repository.

        Here are some more details:

        # dmidecode -s system-product-name
        Dell System XPS L702X

        # lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA
        00:02.0 VGA compatible controller [0300]: Intel Corporation Device 
[8086:0126] (rev 09) (prog-if 00 [VGA controller])
        01:00.0 VGA compatible controller [0300]: nVidia Corporation Device 
[10de:0dcd] (rev a1) (prog-if 00 [VGA controller])

        # grep rate /proc/acpi/battery/BAT0/state 
        present rate:            2257 mW

        # ./dellL702X.sh off
        _DSM {0x59, 0x00, 0x00, 0x11}
        _PS3 0x3
        Dell L702X Optimus appears to be off

        # lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA
        00:02.0 VGA compatible controller [0300]: Intel Corporation Device 
[8086:0126] (rev 09) (prog-if 00 [VGA controller])
        01:00.0 VGA compatible controller [0300]: nVidia Corporation Device 
[10de:0dcd] (rev ff) (prog-if ff)

         #grep rate /proc/acpi/battery/BAT0/state 
        present rate:            1321 mW

        Hope it helps.


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