Bug 84920

(In reply to Apostolos B. from comment #0) 
> Oct 11 23:20:38 mainland kernel: [drm:radeon_uvd_cs_msg] *ERROR* No more
> free UVD handles!

What browser do you use? Do you have video acceleration enabled in flash?

It sounds like flash is trying to play a lot of videos at the same time.

No flash. HW acceleration is gst-vaapi with the vdpau driver for r600. Firefox 32.

libva info: VA-API version 0.36.0
libva info: va_getDriverName() returns 0
libva info: User requested driver 'vdpau'
libva info: Trying to open /usr/lib/dri/vdpau_drv_video.so
libva info: Found init function __vaDriverInit_0_35
libva info: va_openDriver() returns 0
vainfo: VA-API version: 0.36 (libva 1.4.0)
vainfo: Driver version: Splitted-Desktop Systems VDPAU backend for VA-API - 0.7.4
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            : VAEntrypointVLD
      VAProfileMPEG2Main              : VAEntrypointVLD
      VAProfileMPEG4Simple            : VAEntrypointVLD
      VAProfileMPEG4AdvancedSimple    : VAEntrypointVLD
      VAProfileH264Baseline           : VAEntrypointVLD
      VAProfileH264Main               : VAEntrypointVLD
      VAProfileH264High               : VAEntrypointVLD
      VAProfileVC1Advanced            : VAEntrypointVLD

I observe the same issue on virtual machine with VGA passthrough. The virtual guest runs only Kodi media center session with autologin from lightdm display manager.
The issue is easily reproducible when I do fast forward (FF).

Here's sample from dmesg:
[  195.123895] perf interrupt took too long (10006 > 10000), lowering kernel.perf_event_max_sample_rate to 12500
[  457.994431] perf interrupt took too long (20020 > 20000), lowering kernel.perf_event_max_sample_rate to 6250
[45310.627571] [drm:radeon_uvd_cs_msg] *ERROR* No more free UVD handles!
[45310.627575] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !
... and lots of such messages ...
[45323.651977] [drm:radeon_uvd_cs_msg] *ERROR* No more free UVD handles!
[45323.651979] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !


You see, that before doing FF there were some messages and long uptime without any message. When I stop doing FF the messages stop.

The system is Debian GNU/Linux 8.0 Jesie

$ uname -a
Linux infmc 3.16.0-4-686-pae #1 SMP Debian 3.16.7-ckt4-3 (2015-02-03) i686 GNU/Linux

$ lspci -vnn | grep -A 10 VGA
03:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Caicos [Radeon HD 6450/7450/8450 / R5 230 OEM] [1002:6779] (prog-if 00 [VGA controller])
	Subsystem: ASUSTeK Computer Inc. Device [1043:3017]
	Physical Slot: 0
	Flags: bus master, fast devsel, latency 0, IRQ 43
	Memory at e0000000 (64-bit, prefetchable) [size=256M]
	Memory at fe800000 (64-bit, non-prefetchable) [size=128K]
	I/O ports at c000 [size=256]
	Expansion ROM at fe820000 [disabled] [size=64K]
	Capabilities: <access denied>
	Kernel driver in use: radeon

The graphics card is ASUS AMD R5 230 1G.

(In reply to Alexander from comment #3)
> I observe the same issue on virtual machine with VGA passthrough. The
> virtual guest runs only Kodi media center session with autologin from
> lightdm display manager.
> The issue is easily reproducible when I do fast forward (FF).

Do you run Kodi with the VA-API wrapper or the native VDPAU backend? The VA-API wrapper isn't really supported any more, so the issue is most likely somewhere there.

What happens here is that the hardware runs out of UVD handles because the software stack is trying to play a lot of streams at the same time.

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