Using Ubuntu 14.04, intel hd 3000, nvidia gt540m, same problem as above unable to switch from intel to nvidia, updated system still same bug,
sudo prime-select query unknown sudo prime-select nvidia Error: alternatives are not set up properly Error: nvidia mode can't be enabled sudo cat /proc/acpi/bbswitch 0000:01:00.0 ON dmesg | grep -E 'bbswitch|nvidia' [ 9.854343] bbswitch: module verification failed: signature and/or required key missing - tainting kernel [ 9.854498] bbswitch: version 0.7 [ 9.854504] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.GFX0 [ 9.854510] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG0.PEGP [ 9.854565] bbswitch: detected an Optimus _DSM function [ 9.854574] bbswitch: Succesfully loaded. Discrete card 0000:01:00.0 is on [ 22.177483] 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/ubuntu-drivers-common/+bug/1310023/+attachment/4134695/+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/ubuntu-drivers-common/+bug/1310023/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
