[Nouveau] NV50: xv fullscreen issues

[Ben Skeggs]

On 12/26/08, Daniel Eklöf <daniel at ekloef.se> wrote:
> Hi,
>
> I've been trying out nouveau for a while now and I must say I'm impressed.
> Performance in KDE4 in general seems better than the nvidia blob; way to go!
>
> There are a couple of annoyances though:
>
> XV in fullscreen doesn't work. I'm running in composite mode, and non
> fullscreen video works well enough. Going fullscreen in e.g gmplayer gives
> me:
>
> [ws] Error in display. -0.005 ct: -0.000  25/ 25 30% 23%  0.8% 3 6
>
> [ws]  Error code: 8 ( BadMatch (invalid parameter attributes) )
>
> [ws]  Request code: 140
>
> [ws]  Minor code: 19
>
> [ws]  Modules: flip_page
>
> xine crashes in a similar way. mplayer (non GUI version) doesn't crash, but
> all I get is a black screen with "BadMatch" errors spamming the console.
>
> The BadMatch is from nv50_xv.c:54
>
>        if (exaGetPixmapOffset(ppix) < pNv->EXADriverPtr->offScreenBase)
>                 return FALSE;
>
> commenting out those lines stops the players from crashing, but I still get
> just a black screen.
I'm typing this from a mobile phone so answers will be brief sorry!
Your composite manager is probably unredirecting fullscreen windows.
We can't currently render directly to the scanout buffer with the 3D
engine, which is what the above code checks for.

> After having crashed gmplayer (with the code lines above re-enabled), I also
> notice that screen updates are a bit shaky - sometimes the screen isn't
> updated until I press a key or move the mouse (e.g. typing 'ls' doesn't list
> any files until I press another key, web pages aren't displayed until I move
> the mouse and so on). At this point, I sometimes also see an unusually high
> CPU load from X (around 75%). Sometimes X freezes, sometimes not.
I don't see this on my systems, but i'll look into it when i'm back in action.

>
> One more odd thing is that I don't get any interrupts on the NV50 during
> "normal use" (as reported by /proc/interrupts). I sometimes get an interrupt
> storm when starting X, then nothing. I sometimes see a number of interrupts
> after having crashed gmplayer when trying to play a video fullscreen. But
> other than that, no interrupts what so ever.
Completely normal, we don't currently make use of interrupts from the
gpu save for error reporting.

>
> One last question, and this may not even be nouveau related since I also see
> this with the nv driver (so please feel free to yell RTFM! or just ignore it
> :) ). If I start X as a non-root user, it choses 1280x1024 as default
> resolution (the panel's native resolution is 1680x1050). I dont't see this
> in KDM, or when starting as root (so, I can for example start kdm in the
> correct resolution, but then when I log in, as non-root, the resolution is
> changed to 1280x1024). It doesn't seem to matter what I set in xorg.conf.
> The EDID output does report 1680x1050, and xrandr also sees it. In fact,
> just opening the "Display" settings in KDE's control panel causes a switch
> to 1680x1050. Needless to say, the binary nvidia driver doesn't have this
> problem.
>
> Random system info:
>
> Linux tiny 2.6.28 #1 SMP Thu Dec 25 12:45:15 CET 2008 x86_64 AMD Athlon(tm)
> 64 X2 Dual Core Processor 4400+ AuthenticAMD GNU/Linux
>
> 01:00.0 VGA compatible controller: nVidia Corporation GeForce 8600 GTS (rev
> a1) (prog-if 00 [VGA controller])
>         Subsystem: ASUSTeK Computer Inc. Device 8241
>         Flags: bus master, fast devsel, latency 0, IRQ 18
>         Memory at d2000000 (32-bit, non-prefetchable) [size=16M]
>         Memory at c0000000 (64-bit, prefetchable) [size=256M]
>         Memory at d0000000 (64-bit, non-prefetchable) [size=32M]
>         I/O ports at a000 [size=128]
>         Expansion ROM at d3000000 [disabled] [size=128K]
>         Capabilities: [60] Power Management version 2
>         Capabilities: [68] MSI: Mask- 64bit+ Count=1/1 Enable-
>         Capabilities: [78] Express Endpoint, MSI 00
>         Capabilities: [100] Virtual Channel <?>
>         Capabilities: [128] Power Budgeting <?>
>         Capabilities: [600] Vendor Specific Information <?>
>
> Using latest git libdrm and nouveau sources, xorg-7.4 (server-1.5.3). If
> there's any other info you need, just let me know.
>
> Regards,
> Daniel Eklöf
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