I confirm that the problem exists also on a updated install from Utopic to Vivid 15.04, but Nouveau driver is working just fine.
To use Nouveau driver I did the following: sudo apt-get remove --purge nvidia-settings nvidia-349 nvidia-prime nvidia-opencl-icd-349 sudo add-apt-repository ppa:xorg-edgers/ppa sudo apt-get update sudo aptitude install xserver-xorg-video-nouveau System Info: Ubuntu 15.04 Linux 3.19.0-15-generic #15-Ubuntu SMP Thu Apr 16 23:32:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux Nvidia Card: GK208M [GeForce GT 740M] lspci | egrep "VGA|3D" 00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) 01:00.0 3D controller: NVIDIA Corporation GK208M [GeForce GT 740M] (rev a1) dmesg | grep vgaarb [ 0.439245] vgaarb: setting as boot device: PCI:0000:00:02.0 [ 0.439247] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none [ 0.439249] vgaarb: loaded [ 0.439251] vgaarb: bridge control possible 0000:00:02.0 [ 1.336800] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem [ 29.226146] vgaarb: this pci device is not a vga device [ 29.599365] vgaarb: this pci device is not a vga device -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1381175 Title: vgaarb module not patched To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1381175/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
