F25 Wayland on Optimus-enabled laptops

[Link Dupont]

Two headline features of Fedora 25 are:

- Wayland by default
- Initial support for PRIME offload rendering for NVIDIA Optimus
laptops

My laptop has a dual GPU setup (Skylake + GTX 970), but I can't seem to
start a Wayland session at all. GDM even runs using Xorg, and the
"GNOME" session logs in using Xorg.

I checked my initramfs, but it includes the drm module, as well as both
kernel modules: nouveau.ko and i915.ko. From a console session, I can
start weston (weston-launch), but I can't start gnome-shell (dbus-run-
session -- gnome-shell --display-server --wayland). It errors with:

mutter-WARNING **: Can't initialize KMS backend: could not find drm kms
device.

The Wayland session worked in F24, so I'm guessing this is because of
the dual-GPU support enabled in F25. Should these two features be
mutually exclusive? Should I expect wayland *or* GPU render offloading?

[AV]

On Sat, 2016-11-26 at 06:37 -0800, Link Dupont wrote:
> Two headline features of Fedora 25 are:
> Wayland by default
> Initial support for PRIME offload rendering for NVIDIA Optimus
>
> laptops
>
> My laptop has a dual GPU setup (Skylake + GTX 970), but I can't seem
> to
> start a Wayland session at all. GDM even runs using Xorg, and the
> "GNOME" session logs in using Xorg.
>
> I checked my initramfs, but it includes the drm module, as well as
> both
> kernel modules: nouveau.ko and i915.ko. From a console session, I can
> start weston (weston-launch), but I can't start gnome-shell (dbus-
> run-
> session -- gnome-shell --display-server --wayland). It errors with:
>
> mutter-WARNING **: Can't initialize KMS backend: could not find drm
> kms
> device.
>
> The Wayland session worked in F24, so I'm guessing this is because of
> the dual-GPU support enabled in F25. Should these two features be
> mutually exclusive? Should I expect wayland *or* GPU render
> offloading?

See https://blogs.gnome.org/uraeus/2016/11/01/discrete-graphics-and-fed
ora-workstation-25/

AV

[Roman]

В Сб, 26/11/2016 в 06:37 -0800, Link Dupont пишет:
> Two headline features of Fedora 25 are:
> Wayland by default
> Initial support for PRIME offload rendering for NVIDIA Optimus
>
> laptops
>
> My laptop has a dual GPU setup (Skylake + GTX 970), but I can't seem
> to
> start a Wayland session at all. GDM even runs using Xorg, and the
> "GNOME" session logs in using Xorg.
>
> I checked my initramfs, but it includes the drm module, as well as
> both
> kernel modules: nouveau.ko and i915.ko. From a console session, I can
> start weston (weston-launch), but I can't start gnome-shell (dbus-
> run-
> session -- gnome-shell --display-server --wayland). It errors with:
>
> mutter-WARNING **: Can't initialize KMS backend: could not find drm
> kms
> device.
>
> The Wayland session worked in F24, so I'm guessing this is because of
> the dual-GPU support enabled in F25. Should these two features be
> mutually exclusive? Should I expect wayland *or* GPU render
> offloading?

IMHO its better to use bumblebee for now - it works fine with wayland
https://fedoraproject.org/wiki/Bumblebee
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[Link Dupont]

On Sun, 2016-11-27 at 15:39 +0300, Roman wrote:
> IMHO its better to use bumblebee for now - it works fine with wayland
> https://fedoraproject.org/wiki/Bumblebee

Wow. Just tried Bumblebee again and it definitely works the best so
far. Thanks. :)