AMDGPU 1.0 DDX Driver Released

[phoronix]

Phoronix: AMDGPU 1.0 DDX Driver Released

In addition to the recent Radeon X.Org DDX stable update, Michel D?nzer of AMD had a few days ago put out AMDGPU v1.0.0 as the DDX driver's first declared release...

http://www.phoronix.com/scan.php?page=news_item&px=AMDGPU-Xorg-1.0

[RussianNeuroMancer]

I wonder if AMD will test compatibility of modesetting DDX driver and fglrx OpenGL libraries.

[Klassic Six]

So why Fedora use xf86-video-modesetting instead of amdgpu driver on Tonga?

[darkbasic]

So why Fedora use xf86-video-modesetting instead of amdgpu driver on Tonga?

I use xf86-video-modesetting instead of xf86-video-ati, what's the matter?

[mannerov]

I looked the code of both modesetting and amdgpu.

Differences I found:
. modesetting does support async flips (optionnal for Present/DRI3)
. amdgpu does implement all the workarounds needed to have DRI2 DRI_PRIME working (for DRI3, modesetting is sufficient).
. modesetting does use generic drm calls, while amdgpu does use some special amdgpu ones.

I'd advise to use modesetting, and if something doesn't work try amdgpu.

[Adriannho]

I looked the code of both modesetting and amdgpu.

Differences I found:
. modesetting does support async flips (optionnal for Present/DRI3)
. amdgpu does implement all the workarounds needed to have DRI2 DRI_PRIME working (for DRI3, modesetting is sufficient).
. modesetting does use generic drm calls, while amdgpu does use some special amdgpu ones.

I'd advise to use modesetting, and if something doesn't work try amdgpu.

How does one know if modesetting is on instead of the driver specific DDX?

[BSDude]

How does one know if modesetting is on instead of the driver specific DDX?

Well because this is a userspace component just quering the db for installed packages should give you an idea!

[Guest]

Does anyone know about the performance difference, if any, between using modesetting and using xf86-video-amdgpu?

[Adriannho]

Well because this is a userspace component just quering the db for installed packages should give you an idea!

Well, apparently xf86-video-modesetting is part of the main xorg package now (at least in arch).

I did add this

 Section "Device"
    Identifier    "devname"
    Driver        "modesetting"
EndSection

to my xorg.conf.d conf files but I also have xf86-video-ati installed. Now I don't know which one is in use.

[Tomin]

I'd guess that /var/log/Xorg.0.log would tell that (or journalctl if you use that without outputting it to the log file). I don't have any computers that use modesetting so I can't say which line it is, but probably grepping "modesetting" would work.