On Saturday 17 December 2005 18:00, Alan Anderson wrote:
> HI,
>
> This is issue mentioned on the mythtv user list, I don't see anything
> on the ivtv-user list. So I am cross posting. My apologies if this
> is a known issue.
>
> I have a PVR-150 on a mythtv SBE. I started to notice some
> recordings begin to develop distortion on the top 1/4 of the screen.
> It took me a while to figure out it was only on recordings from the
> SBE and not the MBE which has a pvr-250. And looking at the
> recording times the issue only started after an upgrade to the
> ivtv-0.4.0 and 2.6.13 kernel (2.6.13-1.1532_FC4), on the SBE.
>
> I first tried to upgrade the firmware and ran into an additional
> issue. The latest version of firmware causes the pvr-150 to hung
> while watching live tv under mythtv. No problems under mplayer.
> This hang occurs under driver 0.3.8, 0.4.0 and 0.4.1. If I copy an
> older firmware file in place and do a ivtvctl --reload the pvr-150
> works again. Once mythv is started and times out even mplayer can
> not open /dev/video0 it simply hangs. The reload of the firmware
> restores mplayers ability to open the device.
This seems to be some issue with MythTV. I'm not sure what the current
status is on this, though.
> But the distortion issue is present under mplayer after 45 to 60
> minutes. If you change channels the distortion goes way for a while
> then returns 15-30 minutes later. Switching from window to full
> screen does not affect the distortion. Only changing channels or
> exiting mplayer and restarting it gets rid of the distortion for a
> short while. Switching firmware versions did not affect the
> distortion issue.
>
> I reproduced the distortion issue under 0.4.0 and 0.4.1 with mplayer.
> Only after dropping back to the 0.3.8 driver did the problem go
> away. Its been 24 hours and so far its clean. Also the picture
> under 0.3.8 is noticeably cleaner then under 0.4.0 or 0.4.1. The
> 0.4.1 had a definite ghost image while the 0.3.8 does not. Maybe
> this is adjustable I don't know since the distortion was still
> present I didn't do much experimenting.
There aren't many changes that can cause something like this. In fact, I
can think of only one. Switch to 0.4.1, edit ivtv-streams.c, go to line
975 and uncomment the lines:
// if (atomic_read(&itv->capturing) == 0)
// ivtv_vapi(itv, IVTV_API_ENC_MISC, 2, 3, 1);
And see if this fixes the problem for you.
> I also have the issue with the pvr-150 where the sound gets muted and
> requires a reboot to fix. I believe this also happened after the
> 0.4.0 upgrade but it will be a while before I know if dropping back
> to 0.3.8 helped that issue. The sound mute issues was much more
> intermittant.
This should be fixed in 0.4.1.
Hans
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