Chris, the Nvidia-prime deal is expected as prime-select isn't viable with the switch to libglvnd. Whether a means to switch gpu's is going to be provided I've no clue.. The loss of prime sync is a double whammy for hybrid device users, especially in light of no apparent wayland support for such devices on the Nvidia side.
On Mar 4, 2018 4:05 PM, "Chris McDonough" <chr...@plope.com> wrote: I can confirm the results of xrandr and dmesg|grep drm above with the same kernel and nvidia driver versions on my system (a Thinkpad P50 with an M2000M). An additional symptom I have is that the nvidia-settings application no longer supports PRIME at all; the PRIME Settings category in the application just doesn't appear. Here's the output when I start the application. $ nvidia-settings ** Message: 15:46:31.025: PRIME: No offloading required. Abort ** Message: 15:46:31.026: PRIME: is it supported? no -- You received this bug notification because you are subscribed to the bug report. https://bugs.launchpad.net/bugs/1752739 Title: PRIME Synchronization doesn't work with linux-kernel 4.15. Status in nvidia-graphics-drivers-390 package in Ubuntu: New Bug description: I believe this issue is pretty well known, ex. here on optimus machine sudo cat /sys/module/nvidia_drm/parameters/modeset [sudo] password for doug: Y $ xrandr --prop | grep PRIME PRIME Synchronization: 0 # this is the one needed to be 1 PRIME Synchronization: 1 PRIME Synchronization: 1 Though suppport seems to be there $ dmesg |grep drm [ 1.863499] [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver [ 1.863501] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on minor 0 [ 1.873239] [drm] Memory usable by graphics device = 2048M [ 1.873244] fb: switching to inteldrmfb from EFI VGA [ 1.873323] [drm] Replacing VGA console driver [ 1.879334] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 1.879334] [drm] Driver supports precise vblank timestamp query. [ 1.908246] [drm] Initialized i915 1.6.0 20171023 for 0000:00:02.0 on minor 1 [ 1.945491] fbcon: inteldrmfb (fb0) is primary device [ 1.945568] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device bug report in arch https://bugs.archlinux.org/task/57305 If I install the older 384 driver then again with kernel 4.15 no prime sync but with the 4.13 kernel it works fine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/+bug/ 1752739/+subscriptions -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1752739 Title: PRIME Synchronization doesn't work with linux-kernel 4.15. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/+bug/1752739/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
