==============Original message text=============== On Wed, 25 Jan 2012 9:40:11 pm CST Andy Walls wrote:
[email protected] wrote: >>Hello,>>I have two servers running Mythbuntu 11.04 and MythTV 0.24.1. >>I have >>three PVR-150 tuners in the server configured as a slave backend, and >>some digital tuners in the master backend. The problem I have is that >>whenever the analog tuners are called for by any frontend (even a local >>one), I get distorted video, with stuttering and image freezes. There >>is >>currently a bug report in with MythTV on a �Analog Channel Change� >>issue. >>I have tried the work-a-round (tune a digital channel before using one >>of >>the analog tuners), but it does not work for me. I finally saw some >>troubleshooting steps for IVTV drivers, and followed some of those >>steps. >>The one that caught my attention, is the �cat /dev/video1 > test.mpg� >>test. I looked at the file that was produced while the command was >>active, and VLC would only play a few seconds of the file and then skip >>to the end, and then terminate the viewing window. The video jumped >>and >>was distorted, just the same as it was in MythTV. So the issue, >>evidently, is not MythTV, but perhaps with IVTV or some related item. >>On a related note, the same hardware works without issues, when >>running >>MythTV 0.21 under Mythbuntu 8.10. >>What would you do next and where would you look for a >>resolution?>>Thanks,>>Jeff >> >>_______________________________________________ >>ivtv-users mailing list >>[email protected] >>http://ivtvdriver.org/mailman/listinfo/ivtv-users >What are the kernel versions shown with uname -a? Linux MYTHBE2 2.6.38-13-generic #54-Ubuntu SMP Tue Jan 3 13:44:52 UTC 2012 i686 i686 i386 GNU/Linux >What are the ivtv-driver versions shown with v4l2-ctl -d /dev/video1 >--log-status? ivtv1: Version: 1.4.2 Card: Hauppauge WinTV PVR-150 >What other devices are shown sharing the interrupt lines with ivtv using >cat /proc/interrupts? CPU0 CPU1 0: 580 0 IO-APIC-edge timer 1: 3649 0 IO-APIC-edge i8042 6: 3 0 IO-APIC-edge floppy 7: 0 0 IO-APIC-edge parport0 8: 1 0 IO-APIC-edge rtc0 9: 0 0 IO-APIC-fasteoi acpi 14: 63335 0 IO-APIC-edge ata_piix 15: 1294927 0 IO-APIC-edge ata_piix 16: 7153671 2827260 IO-APIC-fasteoi uhci_hcd:usb2, uhci_hcd:usb5, nvidia 17: 12238 7179 IO-APIC-fasteoi ivtv1 18: 5690498 0 IO-APIC-fasteoi ata_piix, uhci_hcd:usb4, eth0, Ensoniq AudioPCI 19: 74042 0 IO-APIC-fasteoi uhci_hcd:usb3, ivtv2 22: 1829 0 IO-APIC-fasteoi ivtv0 23: 3 0 IO-APIC-fasteoi ehci_hcd:usb1 NMI: 0 0 Non-maskable interrupts LOC: 14667959 15620982 Local timer interrupts SPU: 0 0 Spurious interrupts PMI: 0 0 Performance monitoring interrupts IWI: 0 0 IRQ work interrupts RES: 2407721 2344290 Rescheduling interrupts CAL: 789 2664 Function call interrupts TLB: 13663 20105 TLB shootdowns TRM: 0 0 Thermal event interrupts THR: 0 0 Threshold APIC interrupts MCE: 0 0 Machine check exceptions MCP: 540 540 Machine check polls ERR: 0 MIS: 0 Looks like one of the USB ports shares its IRQ with one of the cards, but my issue happens with all three cards, so that doesn't seem to be the likely cause of the issue. >What is the cpu loading shown with top during video capture? Are there >high numbers for user or io wait percentages? Tasks: 146 total, 1 running, 145 sleeping, 0 stopped, 0 zombie Cpu(s): 7.2%us, 4.0%sy, 0.0%ni, 88.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 2059632k total, 1143540k used, 916092k free, 112388k buffers Swap: 2095100k total, 0k used, 2095100k free, 688688k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2799 jpreston 20 0 214m 49m 24m S 2 2.5 36:37.44 knotify4 7959 jpreston 20 0 72220 12m 9.8m S 2 0.6 0:04.54 xfce4-terminal 1263 root 20 0 88408 51m 14m S 1 2.6 1:35.49 Xorg 8028 jpreston 20 0 3360 504 440 S 1 0.0 0:00.35 cat 8082 jpreston 20 0 2632 1136 848 R 1 0.1 0:00.08 top 1345 jpreston 20 0 6464 2516 1788 S 0 0.1 0:06.88 xscreensaver 1 root 20 0 3028 1792 1216 S 0 0.1 0:00.90 init 2 root 20 0 0 0 0 S 0 0.0 0:00.04 kthreadd 3 root 20 0 0 0 0 S 0 0.0 0:01.95 ksoftirqd/0 5 root 20 0 0 0 0 S 0 0.0 0:03.60 kworker/u:0 6 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0 7 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/1 9 root 20 0 0 0 0 S 0 0.0 0:00.71 ksoftirqd/1 11 root 0 -20 0 0 0 S 0 0.0 0:00.00 cpuset 12 root 0 -20 0 0 0 S 0 0.0 0:00.00 khelper 13 root 0 -20 0 0 0 S 0 0.0 0:00.00 netns 15 root 20 0 0 0 0 S 0 0.0 0:00.27 sync_supers This was captured during a cat /dev/video1 > test.mpg, and the CPU usage never went above a few percent for any process. The file was still distorted and flawed. Where else can I look for this? Do you have any other ideas? Thank you much for your assistance so far. Jeff
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