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I'm having really weird bug and I don't know where should I look for help.
I own Leadtek WinFast DTV2000 H Plus card with Conexant CX2388x PCI bridge and Xcieve XC4000 tuner.
I'm using it with mplayer to watch analog cable tv. I'm suffering from buffer underrun caused by alsa driver (cx88_alsa). What's more interesting it's occurring more often when I'm watching channels only on specific frequencies (mostly high). The side effect of this is that mplayer (also mplayer2) has a memory leak which causes to drop frames after aprox. 10 minutes.
When I'm having underruns dmesg shows something like this:
May 26 11:26:12 localhost kernel: [81922.660861] cx88[0]: irq aud [0x1101] dn_risci1* dnf_of dn_sync*
May 26 11:26:14 localhost kernel: [81924.159913] cx88[0]: irq aud [0x1101] dn_risci1* dnf_of dn_sync*
May 26 11:26:16 localhost kernel: [81926.855046] cx88[0]: irq aud [0x1101] dn_risci1* dnf_of dn_sync*
May 26 11:26:19 localhost kernel: [81929.550115] cx88[0]: irq aud [0x1101] dn_risci1* dnf_of dn_sync*
May 26 11:26:22 localhost kernel: [81932.245248] cx88[0]: irq aud [0x1101] dn_risci1* dnf_of dn_sync*
May 26 11:26:25 localhost kernel: [81935.341748] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
May 26 11:26:25 localhost kernel: [81935.352431] cx88[0]: irq aud [0x1101] dn_risci1* dnf_of dn_sync*
May 26 11:26:25 localhost kernel: [81935.352440] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*I've figured a simple workaround but it's causing sound stuttering on high frequencies (because of more buffer underruns). Disable audio in mplayer and run:
sox -t alsa hw:1,0 -t alsa hw:0,0I've found similar problem but no one has found a soultion: http://www.digipedia.pl/usenet/thread/17087/5974/
I've tried also applying workaround from https://bugs.launchpad.net/ubuntu/+sour … bug/836062 post #5 but it doesn't work.
I really don't know where should I report this bug. Any help will be really appreciated.
Info and configs:
lspci:
08:07.0 Multimedia video controller: Conexant Systems, Inc. CX23880/1/2/3 PCI Video and Audio Decoder (rev 05)
Subsystem: LeadTek Research Inc. Device 6f42
Flags: bus master, medium devsel, latency 32, IRQ 21
Memory at f9000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: <access denied>
Kernel driver in use: cx8800
08:07.1 Multimedia controller: Conexant Systems, Inc. CX23880/1/2/3 PCI Video and Audio Decoder [Audio Port] (rev 05)
Subsystem: LeadTek Research Inc. Device 6f42
Flags: bus master, medium devsel, latency 32, IRQ 21
Memory at fb000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: <access denied>
Kernel driver in use: cx88_audio
08:07.2 Multimedia controller: Conexant Systems, Inc. CX23880/1/2/3 PCI Video and Audio Decoder [MPEG Port] (rev 05)
Subsystem: LeadTek Research Inc. Device 6f42
Flags: bus master, medium devsel, latency 32, IRQ 21
Memory at fa000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: <access denied>
Kernel driver in use: cx88-mpeg driver managermplayer config:
# Write your default config options here!
tv=driver=v4l2:input=1:norm=PAL-DK:channels=119250-ch1,127250-ch2,135250-ch3,143250-ch4,151250-ch5,159250-ch6,167250-ch7,175250-ch8,183250-ch9,191250-ch10,199250-ch11,215250-ch12,223250-ch13,231250-ch14,239250-ch15,247250-ch16,255250-ch17,263250-ch18,271250-ch19,279250-ch20,287250-ch21,295250-ch22,303250-ch23,311250-ch24,319250-ch25,327250-ch26,335250-ch27,343250-ch28,351250-ch29,359250-ch30,367250-ch31,375250-ch32,383250-ch33,391250-ch34,399250-ch35,407250-ch36,415250-ch37,423250-ch38,431250-ch39,439250-ch40,447250-ch41,455250-ch42,463250-ch43,471250-ch44,479250-ch45,487250-ch46,495250-ch47,503250-ch48,511250-ch49,527250-ch50,535250-ch51,591200-ch52Example output of sox underruns:
hw:1,0: (alsa)
Encoding: Signed PCM
Channels: 2 @ 16-bit
Samplerate: 48000Hz
Replaygain: off
Duration: unknown
In:0.00% 00:00:00.17 [00:00:00.00] Out:4.10k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:02.05 [00:00:00.00] Out:94.2k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:03.24 [00:00:00.00] Out:152k [ -|- ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:04.78 [00:00:00.00] Out:225k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:07.17 [00:00:00.00] Out:340k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:08.53 [00:00:00.00] Out:406k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:10.07 [00:00:00.00] Out:479k [ -|- ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:11.43 [00:00:00.00] Out:545k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:13.14 [00:00:00.00] Out:627k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:14.51 [00:00:00.00] Out:692k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:15.70 [00:00:00.00] Out:750k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:16.55 [00:00:00.00] Out:791k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:18.77 [00:00:00.00] Out:897k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:19.97 [00:00:00.00] Out:954k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:20.31 [00:00:00.00] Out:971k [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:22.19 [00:00:00.00] Out:1.06M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:23.38 [00:00:00.00] Out:1.12M [ -|- ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:24.58 [00:00:00.00] Out:1.18M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:25.77 [00:00:00.00] Out:1.23M [ -|- ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:26.97 [00:00:00.00] Out:1.29M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:28.16 [00:00:00.00] Out:1.35M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:30.21 [00:00:00.00] Out:1.45M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:31.23 [00:00:00.00] Out:1.50M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:32.94 [00:00:00.00] Out:1.58M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:33.96 [00:00:00.00] Out:1.63M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:35.33 [00:00:00.00] Out:1.69M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:36.86 [00:00:00.00] Out:1.77M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:38.06 [00:00:00.00] Out:1.82M [ | ] Clip:0 sox WARN alsa: under-run
In:0.00% 00:00:39.08 [00:00:00.00] Out:1.87M [ -|- ] Clip:0 sox WARN alsa: under-runOffline
Hi mate,
Just to let you know you are not alone. I have the same issue with Leadtek WinFast DTV2000 H (rev. J) card. It's card=82 on the cx88 driver support list on v4l site.
I'm seeing the same messages on Mythbuntu Lucid 10.04 I just noticed it today troubleshooting some tunning issue. I found some other people having same issue dating from 2007 and 2009 with some other cards too, not sure if the same driver though.
$ dmesg | egrep "cx2388|dvb|DVB|cx88"
[ 18.686379] cx88/2: cx2388x MPEG-TS Driver Manager version 0.0.7 loaded
[ 18.686470] cx88/0: cx2388x v4l2 driver version 0.0.7 loaded
[ 18.698803] cx88[0]: subsystem: 107d:6f2b, board: WinFast DTV2000 H rev. J [card=82,autodetected], frontend(s): 1
[ 18.698805] cx88[0]: TV tuner type 63, Radio tuner type -1
[ 18.701199] cx2388x alsa driver version 0.0.7 loaded
[ 18.916524] tuner 0-0043: chip found @ 0x86 (cx88[0])
[ 18.927543] tuner 0-0061: chip found @ 0xc2 (cx88[0])
[ 18.988392] input: cx88 IR (WinFast DTV2000 H rev. as /devices/pci0000:00/0000:00:14.4/0000:03:07.2/input/input6
[ 18.988524] cx88[0]/2: cx2388x 8802 Driver Manager
[ 18.988555] cx88-mpeg driver manager 0000:03:07.2: PCI INT A -> GSI 21 (level, low) -> IRQ 21
[ 18.988565] cx88[0]/2: found at 0000:03:07.2, rev: 5, irq: 21, latency: 32, mmio: 0xfb000000
[ 18.988572] IRQ 21/cx88[0]: IRQF_DISABLED is not guaranteed on shared IRQs
[ 18.989608] cx8800 0000:03:07.0: PCI INT A -> GSI 21 (level, low) -> IRQ 21
[ 18.989618] cx88[0]/0: found at 0000:03:07.0, rev: 5, irq: 21, latency: 32, mmio: 0xfa000000
[ 18.989630] IRQ 21/cx88[0]: IRQF_DISABLED is not guaranteed on shared IRQs
[ 18.989753] cx88[0]/0: registered device video0 [v4l2]
[ 18.989804] cx88[0]/0: registered device vbi0
[ 18.989852] cx88[0]/0: registered device radio0
[ 19.007549] cx88/2: cx2388x dvb driver version 0.0.7 loaded
[ 19.007554] cx88/2: registering cx8802 driver, type: dvb access: shared
[ 19.007557] cx88[0]/2: subsystem: 107d:6f2b, board: WinFast DTV2000 H rev. J [card=82]
[ 19.007561] cx88[0]/2: cx2388x based DVB/ATSC card
[ 19.007563] cx8802_alloc_frontends() allocating 1 frontend(s)
[ 19.007791] cx88_audio 0000:03:07.1: PCI INT A -> GSI 21 (level, low) -> IRQ 21
[ 19.007801] IRQ 21/cx88[0]: IRQF_DISABLED is not guaranteed on shared IRQs
[ 19.007827] cx88[0]/1: CX88x/0: ALSA support for cx2388x boards
[ 19.036402] DVB: registering new adapter (cx88[0])
[ 19.036405] DVB: registering adapter 0 frontend 0 (Conexant CX22702 DVB-T)...
[ 28.937066] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
[ 28.937078] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
[ 28.937089] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
[ 28.937097] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
[ 28.937105] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
[ 28.937113] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
[ 28.937129] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
[ 28.937137] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
[ 28.937145] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
Some of them solved their issue by unloading the cards ALSA driver cx88_alsa but not sure if that is a good idea since that module is used by snd_pcm and will probably have audio impact.
My IRQ assignments:
$ cat /proc/interrupts
CPU0 CPU1
0: 27 115 IO-APIC-edge timer
1: 0 2 IO-APIC-edge i8042
4: 0 2 IO-APIC-edge
6: 0 5 IO-APIC-edge floppy
7: 0 0 IO-APIC-edge parport0
8: 0 1 IO-APIC-edge rtc0
9: 0 0 IO-APIC-fasteoi acpi
12: 0 4 IO-APIC-edge i8042
14: 0 0 IO-APIC-edge pata_atiixp
15: 0 0 IO-APIC-edge pata_atiixp
16: 0 1223 IO-APIC-fasteoi ohci_hcd:usb3, ohci_hcd:usb4, HDA Intel
17: 0 0 IO-APIC-fasteoi ehci_hcd:usb1
18: 1 28 IO-APIC-fasteoi ohci_hcd:usb5, ohci_hcd:usb6, ohci_hcd:usb7
19: 3454 25488 IO-APIC-fasteoi ehci_hcd:usb2, HDA Intel
21: 676891 17268 IO-APIC-fasteoi cx88[0], cx88[0], cx88[0]
22: 0 3 IO-APIC-fasteoi ohci1394
25: 42059 164 PCI-MSI-edge eth0
26: 3 635727 PCI-MSI-edge ahci
27: 0 0 PCI-MSI-edge fglrx[0]@PCI:1:5:0
NMI: 0 0 Non-maskable interrupts
LOC: 5877466 5852321 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 0 0 Performance monitoring interrupts
PND: 0 0 Performance pending work
RES: 2710497 3588734 Rescheduling interrupts
CAL: 1027 64 Function call interrupts
TLB: 91005 89118 TLB shootdowns
TRM: 0 0 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
MCE: 0 0 Machine check exceptions
MCP: 115 115 Machine check polls
ERR: 2
MIS: 0
The card is sharing the same IRQ 21 for all three devices I guess DVB, analog TV and radio.
03:07.0 Multimedia video controller: Conexant Systems, Inc. CX23880/1/2/3 PCI Video and Audio Decoder (rev 05)
Subsystem: LeadTek Research Inc. Device 6f2b
Flags: bus master, medium devsel, latency 32, IRQ 21
Memory at fa000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: <access denied>
Kernel driver in use: cx8800
Kernel modules: cx8800
03:07.1 Multimedia controller: Conexant Systems, Inc. CX23880/1/2/3 PCI Video and Audio Decoder [Audio Port] (rev 05)
Subsystem: LeadTek Research Inc. Device 6f2b
Flags: bus master, medium devsel, latency 32, IRQ 21
Memory at f9000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: <access denied>
Kernel driver in use: cx88_audio
Kernel modules: cx88-alsa
03:07.2 Multimedia controller: Conexant Systems, Inc. CX23880/1/2/3 PCI Video and Audio Decoder [MPEG Port] (rev 05)
Subsystem: LeadTek Research Inc. Device 6f2b
Flags: bus master, medium devsel, latency 32, IRQ 21
Memory at fb000000 (32-bit, non-prefetchable) [size=16M]
Capabilities: <access denied>
Kernel driver in use: cx88-mpeg driver manager
Kernel modules: cx8802
I'm using this card on MythTV setup for watching and recording DVB-T TV and can't say I've noticed any sound issues during playback. But what I've noticed is that the card can't tune some DVB channels here in Australia after I upgraded to MythTV 0.25 and Mythbuntu 10.04.
If you ask me this issue should go to the v4l list since I think is driver related.
Cheers,
Igor
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