NVIDIA Developer Posts Auto PRIME Detection, Mesa USB Loader Support

[phoronix]

Phoronix: NVIDIA Developer Posts Auto PRIME Detection, Mesa USB Loader Support

NVIDIA Linux developer Thierry Reding has posted some Mesa patches this Christmas weekend...

http://www.phoronix.com/scan.php?page=news_item&px=NVIDIA-Auto-Prime-Detect

[lumks]

Wait. You can enable PRIME via dri.conf file? HOW?

[droste]

The option is called "device_id" and takes the PCI id of the device you want to use. You may find examples if you gooole "device_id drirc".

/edit:
To get the value for this option run "udevadm info /dev/dri/card0 | grep ID_PATH_TAG" and replace "card0" with the card you want.

[Awesomeness]

NVIDIA Linux developer Thierry Reding has posted some Mesa patches this Christmas weekend...

Cool but why? NVidia doesn't use Mesa. Why contribute to it? Or was that done during his free time and NVidia has nothing to do with that?

[haagch]

Cool but why? NVidia doesn't use Mesa. Why contribute to it? Or was that done during his free time and NVidia has nothing to do with that?

"split scanout/render devices" and "host1x bus" is more of a tegra thing. I.e. you have a simple 2D GPU that drives the display and another GPU that is a real nvidia GPU. They are more open to work on nouveau for ARM.

E.g. look at this: https://github.com/Gnurou/mesa/commits/renderonly
This "tegra" gallium driver + "renderonly" support in nouveau are used to automagically support this configuration.

This patch here will hopefully make this a bit cleaner, see: https://github.com/Gnurou/xserver/is...ment-269046173

[haagch]

Wait. You can enable PRIME via dri.conf file? HOW?

The original mailing list entry gives an example https://lists.freedesktop.org/archiv...y/060131.html:

<driconf>
    <device driver="loader">
        <application name="Glmark2" executable="glmark2-wayland">
            <option name="device_id" value="pci-0000_01_00_0" />
        </application>
    </device>
</driconf>

I made a simple GUI with pyqt, but it's a bit hacky: https://github.com/ChristophHaag/gpuchooser

[andre30correia]

Cool but why? NVidia doesn't use Mesa. Why contribute to it? Or was that done during his free time and NVidia has nothing to do with that?

it's only because optimus laptops for ppl who want to use the official driver, it's a good new

[pal666]

Cool but why? NVidia doesn't use Mesa.

intel does on optimus laptops. which suck on linux for many years. and nvidia does for terga because nobody buys tegras

[haagch]

because nobody buys tegras

MFW

[pal666]

MFW

i don't need your screen, i know there were tegra-based products
but they were unsuccessful, nobody buys tegras in quantity comparable to other gpus. so tegra is a fail.