I have the same problem with my Futjitsu Lifebook AH-531/GFO on Kubuntu 14.04.
lspci | grep 'VGA' 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 525M] (rev a1) dmesg | grep -E 'bbswitch|nvidia' [ 3.047772] nvidia: module license 'NVIDIA' taints kernel. [ 3.126575] nvidia: module verification failed: signature and/or required key missing - tainting kernel [ 3.132672] nvidia 0000:01:00.0: enabling device (0000 -> 0003) [ 3.138900] [drm] Initialized nvidia-drm 0.0.0 20130102 for 0000:01:00.0 on minor 1 [ 4.045734] bbswitch: version 0.7 [ 4.045749] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.GFX0 [ 4.045756] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG0.PEGP [ 4.045815] bbswitch: failed to evaluate \_SB_.PCI0.GFX0._DSM {0xA0,0xA0,0x95,0x9D,0x60,0x00,0x48,0x4D,0xB3,0x4D,0x7E,0x5F,0xEA,0x12,0x9F,0xD4} 0x102 0x0 {0x00,0x00,0x00,0x00}: AE_NOT_FOUND [ 4.045817] bbswitch: No suitable _DSM call found. [ 14.057221] init: Failed to spawn nvidia-persistenced main process: unable to execute: No such file or directory ** Attachment added: "dmidecode.log" https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1310023/+attachment/4121328/+files/dmidecode.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1310023 Title: 14.04: Nvidia Prime is unable to switch to the Nvidia card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1310023/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs