I m not that guy, but i m using mesa and nvidia-prime, and also encountered the same problem. See if this can help.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-prime in Ubuntu. https://bugs.launchpad.net/bugs/1310023 Title: 14.04: Nvidia Prime is unable to switch to the Nvidia card Status in nvidia-prime package in Ubuntu: Fix Released Status in ubuntu-drivers-common package in Ubuntu: Fix Released Status in ubuntu-drivers-common source package in Trusty: Fix Released Bug description: SRU Request On some systems bbswitch requires the "skip_optimus_dsm=1" option in order to load properly. So far we have dealt with this problem with system specific quirks based on DMI information. This some times gives us false positives or doesn't cover all systems (it's hard to quirk all systems). We should simply try with and without that option and use whatever works best for the system. This should cover all cases with no need for additional quirks. [Impact] * Loading bbswitch with the wrong option causes the module to fail from loading which, in turn, prevents hybrid graphics from working properly. [Test Case] * Install the nvidia binary driver, reboot, and check that the NVIDIA GPU is enabled (attach your /var/log/gpu-manager.log) - Expected: the NVIDIA GPU is enabled. - Bad behavior: the system switches back to the intel driver and the NVIDIA GPU is not used. [Regression Potential] * Low. Systems that currently work will keep working as usual, the ones that currently fail should finally work. [Other Info] * N/A -- I did a fresh install of 14.04 the day it was released. I use a XPS 15z laptop form Dell with hybrid graphics (Intel HD 3000 (probably) and Nvidia Geforce GT 525M). Booting doesn't work out of the box, but by setting GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor dell_laptop.backlight=0 quiet splash" in /etc/default/grub it works. acpi=off when installing, removed that from the grub file when installed. I expected that the Prime feature introduced in kernel 3.12 (kernel 3.13.x here) would let me switch between the Intel and Nvidia cards as i like, instead of using Bumblebee, which doesn't work properly with everything. I've installed and tried both the nvidia-331 and nvidia-304 drivers. Exactly the same result from both. Attempting to switch to the Nvidia card in nvidia-settings (tried on almost all of the drivers available, including 331.38) resulted in an error message, in a new window, with no text. prime-switch in terminal gives this output: Segmentation fault (core dumped) Sudoing the process gives no output at all. No graphical performance boost either, still the Intel card... sudo prime-select nvidia gives this output: Error: alternatives are not set up properly Error: nvidia mode can't be enabled I've also tried Bumblebee (not PPA) a few times, but it's also unable to switch. I'm able to use the Intel card temporary, but I would really like to be able to use the full power of my computer... ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: nvidia-prime 0.6.2 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Sat Apr 19 20:52:42 2014 InstallationDate: Installed on 2014-04-17 (1 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) SourcePackage: nvidia-prime UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1310023/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
