BloodsPilot @ XPilot.ktd.krakow.pl

Posted: **Sun Apr 13, 2014 2:42 pm**

I have unplayable 2D performance with the free radeon driver (xserver-xorg-video-radeon 6.14.4-8)
on debian 7 wheezy linux (both on amd athlon64x2, Radeon HD 4350 and amd A8 with integrated radeon gfx)
WITH driver option `NoAccel' = `False' (i.e. WITH 3D acceleration enabled).
But if I disable 3D acceleration (`NoAccel' = `True'), then 2D performance is okay.

That is with 3D acceleration, the client draws about 25/50 frames with client lag of 20 to 50 ms.
Without 3D acceleration, it draws the full 50 frames with client lag between 5 and 10 ms.

I also tried a newer radeon driver (7.x from testing iirc), but it performed no better.

Until the driver improves, the workaround for me is to use a custom `/etc/X11/xorg.conf',
which defines an additional screen without 3D acceleration, which I use on another X-display for
the Xpilot client.

The relevant parts of my xorg.conf are:

Code: Select all

...
Section "Device"
        # radeon driver with options optimized for good 2d performance (xpilot)
        Identifier      "radeon-2d"
        Driver          "radeon"
        BusID           "PCI:4:0:0"

        # NoAccel=True results in better 2d performance, but unusable 3d
        # with current radeon driver (xserver-xorg-video-radeon Version: 1:6.14.4-8 (2014-02).
        Option          "NoAccel"       "True"
EndSection
...
Section "Screen"
        Identifier "Screen2d"
        Device          "radeon-2d"
        Monitor         "Monitor0"
        SubSection "Display"
                Viewport   0 0
                Depth     1
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     4
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     8
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     15
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     16
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection
...

With this I can start the Xpilot display from another virtual terminal like:
startx $(which xterm) -- $(which X) -screen Screen2d :1
Then start window manager and bloodspilot client.
x-window-manager &
bloodspilot-client-x11

Posted: **Sat Apr 19, 2014 11:09 pm**

Just curious, could you try the performance in the SDL client while 3D acceleration is on?

Posted: **Fri May 02, 2014 9:37 am**

The SDL-client is fast with 3D acceleration enabled and relatively slow without 3D acceleration.

NB: There seems to be no option in the sdl client to disable textures on items and shots.
I dislike textures in xpilot, because they distract. And especially with higher scalefactor
one cannot recognize textured items.
Also gravity fields, wormholes, targets etc. are so ugly with textures.

Posted: **Mon May 05, 2014 9:10 pm**

Glad that it works. As for disabling textures, I started doing it, e.g. for treasure chests. I would like to finish it sometime.

BloodsPilot @ XPilot.ktd.krakow.pl

Poor 2D performance with linux radeon driver

Poor 2D performance with linux radeon driver

Re: Poor 2D performance with linux radeon driver

Re: Poor 2D performance with linux radeon driver

Re: Poor 2D performance with linux radeon driver