Debian on XPS 15 9560. Bumblebee sees the GPU and claims to be using it, but not really.

[TungstenOxide]

So I switched to Debian and applied my knowledge from #945 , set the kernel params, and I got Bumblebee to install and be stable, but now I've got quite the interesting predicament.

The computer reports that it's using the GPU, but from its performance, it's clearly not. In Fedora, I pull 60FPS in glxgears with the iGPU and around 500 with the dGPU. In Debian, I'm pulling 60 with "both." I also tested Besiege, because I should be getting about 25 in 4K and a silky smooth 60 in 1440p, but I'm barely getting 5FPS in 4K and my GPU fan isn't running.

I think that the computer thinks it's using the GPU, but it's really not. I have no idea why. With no kernel params, my computer freezes when starting Light DM. Also, lspci | grep 3D doesn't actually return the name of a card, just 01:00.0 3D controller: NVIDIA Corporation Device 1c8d (rev ff)

optirun glxgears -info returns the usual:

GL_RENDERER = GeForce GTX 1050/PCIe/SSE2 GL_VERSION = 4.5.0 NVIDIA 375.82 GL_VENDOR = NVIDIA Corporation

Ideas?

[bluca]

glxgears is not a benchmark - fps are capped to 60 by the bridge

[TungstenOxide]

On Debian? Because on Fedora it was actually reporting 2.7k frames. In addition, even with Optirun, I get like 5 frames in game.

…

On Sun, Apr 15, 2018, 05:57 Luca Boccassi ***@***.***> wrote: glxgears is not a benchmark - fps are capped to 60 by the bridge — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#958 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AL-7AMyUvdklPR54uH7OD1xhUXlgfXrZks5toxmPgaJpZM4TVUTZ> .

[TungstenOxide]

This is now an issue on Fedora as well.

[TungstenOxide]

Wait no it's slightly different. When running on Fedora, optirun glxgears -info returns this:
GL_RENDERER = Mesa DRI Intel(R) HD Graphics 630 (Kaby Lake GT2)

What is going on? Is anyone else having this issue?

[vvv-ca]

I see the same thing on a fresh Debian install.
Try
vblank_mode=0 optirun glxgears
it should report much higher numbers. But the Intel card shows even higher numbers that the nVidia one with vblank_mode=0.