I have same problem. I have a notebook Dell Vostro 3500 with a Intel HD i915 (internal GPU) and Nvidia Geforce 310m (dicrete GPU).
Below are the informations, and the file ".dsl" ~$ sudo dmidecode -s system-product-name && sudo dmidecode -s system-version Vostro 3500 A10 ~$ lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 18) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller [0300]: nVidia Corporation GT218 [GeForce 310M] [10de:0a75] (rev a2) (prog-if 00 [VGA controller]) ** Attachment added: "DSDT_Dell_Vostro_3500.dsl" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/312756/+attachment/1792258/+files/DSDT_Dell_Vostro_3500.dsl -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in ubuntu. https://bugs.launchpad.net/bugs/312756 Title: MASTER: support graphics card hot switch _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
