Hi everyone,

I frequently have difficulties when fast forwarding while watching a  
recorded program in MythTV. It's fairly reproducible; it doesn't  
happen every time I try to fast forward, but when I fast forward  
through multiple commercial breaks in a half hour show, it will  
usually freeze during the third one (jumping forward seems to work  
fine). When this happens, the image of the screen stays frozen, the  
mythtv controls show on the screen fine (though the fast forward  
timer doesn't change). I can escape back to the mythtv menu (though  
it takes unexpectedly long), and all the white text is now the colour  
of the TV image that was on the screen. Has anyone seen this before.  
Any suggestions?

I looked for DMA issues (since that seems to be a common issue here),  
but the only DMA errors in the syslog were on shutdown.

(Sorry for the long description of the problem -- I hope it helps)

The log below is from /var/log/kern.log and shows all the ivtv  
messages while I was using MythTV. (The driver is loaded with  
debug=1) The problem occurred at 21:20.

Oct 30 21:03:49 gold kernel: ivtv0 warning:  
CX2341X_DEC_GET_TIMING_INFO took 60 jiffies (250 per HZ)
Oct 30 21:10:01 gold kernel: ivtv0 warning:  
CX2341X_DEC_GET_TIMING_INFO took 60 jiffies (250 per HZ)
Oct 30 21:10:06 gold kernel: ivtv0 warning: No free mailbox found  
(CX2341X_OSD_SET_GLOBAL_ALPHA)
Oct 30 21:10:06 gold kernel: ivtv0 warning: Clearing mailbox 0: cmd  
0x0000000b flags 0x00000004
Oct 30 21:10:06 gold kernel: ivtv0 warning: Clearing mailbox 1: cmd  
0x00000017 flags 0x00000004
Oct 30 21:10:24 gold kernel: ivtv0 warning: No free mailbox found  
(CX2341X_OSD_SET_GLOBAL_ALPHA)
Oct 30 21:10:24 gold kernel: ivtv0 warning: Clearing mailbox 0: cmd  
0x0000000b flags 0x00000004
Oct 30 21:10:24 gold kernel: ivtv0 warning: Clearing mailbox 1: cmd  
0x0000000d flags 0x00000004
Oct 30 21:20:31 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_STOP_PLAYBACK)
Oct 30 21:20:32 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_SET_EVENT_NOTIFICATION)
Oct 30 21:20:33 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_EXTRACT_VBI)
Oct 30 21:20:33 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_SET_DECODER_SOURCE)
Oct 30 21:20:33 gold kernel: ivtv0 warning: COULDN'T INITIALIZE  
DECODER SOURCE
Oct 30 21:20:34 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_SET_EVENT_NOTIFICATION)
Oct 30 21:20:35 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_START_PLAYBACK)
Oct 30 21:20:36 gold kernel: ivtv0 warning: No free mailbox found  
(CX2341X_OSD_SET_GLOBAL_ALPHA)
Oct 30 21:20:36 gold kernel: ivtv0 warning: Clearing mailbox 0: cmd  
0x0000000b flags 0x00000004
Oct 30 21:20:36 gold kernel: ivtv0 warning: Clearing mailbox 1: cmd  
0x0000000d flags 0x00000003
Oct 30 21:20:37 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_PAUSE_PLAYBACK)
Oct 30 21:20:38 gold kernel: ivtv0 warning: No free mailbox found  
(CX2341X_OSD_SET_GLOBAL_ALPHA)
Oct 30 21:20:38 gold kernel: ivtv0 warning: Clearing mailbox 0: cmd  
0x0000000b flags 0x00000000
Oct 30 21:20:38 gold kernel: ivtv0 warning: Clearing mailbox 1: cmd  
0x00000003 flags 0x00000003
Oct 30 21:20:38 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_SET_PLAYBACK_SPEED)
Oct 30 21:20:39 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_GET_TIMING_INFO)
Oct 30 21:20:39 gold kernel: ivtv0 warning: GET_TIMING: couldn't read  
clock
Oct 30 21:20:40 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_GET_TIMING_INFO)
Oct 30 21:20:40 gold kernel: ivtv0 warning: GET_TIMING: couldn't read  
clock
Oct 30 21:20:41 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_PAUSE_PLAYBACK)
Oct 30 21:20:42 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_SET_PLAYBACK_SPEED)
Oct 30 21:20:43 gold kernel: ivtv0 warning: Could not get result  
(CX2341X_DEC_GET_TIMING_INFO)
Oct 30 21:20:43 gold kernel: ivtv0 warning: GET_TIMING: couldn't read  
clock

[ ... More of the same, possibly in a different order ]

And here's the initialization info (I'm pretty sure some of it's not  
relavent, but I've included it anyways):

Oct 28 23:15:55 gold kernel: ivtv:  ==================== START INIT  
IVTV ====================
Oct 28 23:15:55 gold kernel: ivtv:  version 1.0.0 (2.6.22-2-686 SMP  
mod_unload 686 ) loading
Oct 28 23:15:55 gold kernel: i2c-adapter i2c-2: unable to read EDID  
block.
Oct 28 23:15:55 gold last message repeated 2 times
Oct 28 23:15:55 gold kernel: i2c-adapter i2c-4: unable to read EDID  
block.
Oct 28 23:15:55 gold last message repeated 2 times
Oct 28 23:15:55 gold kernel: i2c-adapter i2c-3: unable to read EDID  
block.
Oct 28 23:15:55 gold last message repeated 2 times
Oct 28 23:15:55 gold kernel: i2c-adapter i2c-4: unable to read EDID  
block.
Oct 28 23:15:55 gold last message repeated 2 times
Oct 28 23:15:55 gold kernel: radeonfb: Monitor 1 type CRT found
Oct 28 23:15:55 gold kernel: radeonfb: Monitor 2 type no found
Oct 28 23:15:55 gold kernel: Console: switching to colour frame  
buffer device 80x30
Oct 28 23:15:55 gold kernel: radeonfb (0000:01:00.0): ATI Radeon Ya
Oct 28 23:15:55 gold kernel: ivtv0: Autodetected Hauppauge card  
(cx23415 based)
Oct 28 23:15:55 gold kernel: ACPI: PCI Interrupt 0000:02:00.0[A] ->  
GSI 21 (level, low) -> IRQ 22
Oct 28 23:15:55 gold kernel: ivtv0: Unreasonably low latency timer,  
setting to 64 (was 32)
Oct 28 23:15:55 gold kernel: ivtv0: loaded v4l-cx2341x-enc.fw  
firmware (376836 bytes)
Oct 28 23:15:55 gold kernel: ivtv0: loaded v4l-cx2341x-dec.fw  
firmware (262144 bytes)
Oct 28 23:15:55 gold kernel: ivtv0: Encoder revision: 0x02060039
Oct 28 23:15:55 gold kernel: ivtv0: Decoder revision: 0x02020023
Oct 28 23:15:55 gold kernel: tveeprom 5-0050: Hauppauge model 48132,  
rev K268, serial# 9956503
Oct 28 23:15:55 gold kernel: tveeprom 5-0050: tuner model is LG TAPE  
H001F MK3 (idx 68, type 47)
Oct 28 23:15:55 gold kernel: tveeprom 5-0050: TV standards NTSC(M)  
(eeprom 0x08)
Oct 28 23:15:55 gold kernel: tveeprom 5-0050: audio processor is  
MSP4448 (idx 27)
Oct 28 23:15:55 gold kernel: tveeprom 5-0050: decoder processor is  
SAA7115 (idx 19)
Oct 28 23:15:55 gold kernel: tveeprom 5-0050: has radio, has IR  
receiver, has no IR transmitter
Oct 28 23:15:55 gold kernel: ivtv0: Autodetected Hauppauge WinTV PVR-350
Oct 28 23:15:55 gold kernel: tuner 5-0043: chip found @ 0x86 (ivtv  
i2c driver #0)
Oct 28 23:15:55 gold kernel: tda9887 5-0043: tda988[5/6/7] found @  
0x43 (tuner)
Oct 28 23:15:55 gold kernel: tuner 5-0061: chip found @ 0xc2 (ivtv  
i2c driver #0)
Oct 28 23:15:55 gold kernel: saa7115 5-0021: saa7115 found  
(1f7115d0e100000) @ 0x42 (ivtv i2c driver #0)
Oct 28 23:15:55 gold kernel: saa7127 5-0044: saa7129 found @ 0x88  
(ivtv i2c driver #0)
Oct 28 23:15:55 gold kernel: msp3400 5-0040: MSP4448G-A2 found @ 0x80  
(ivtv i2c driver #0)
Oct 28 23:15:55 gold kernel: msp3400 5-0040: MSP4448G-A2 supports  
radio, mode is autodetect and autoselect
Oct 28 23:15:55 gold kernel: tuner 5-0061: type set to 47 (LG NTSC  
(TAPE series))
Oct 28 23:15:55 gold kernel: ivtv0: Registered device video0 for  
encoder MPEG (4 MB)
Oct 28 23:15:55 gold kernel: ivtv0: Registered device video32 for  
encoder YUV (2 MB)
Oct 28 23:15:55 gold kernel: ivtv0: Registered device vbi0 for  
encoder VBI (1 MB)
Oct 28 23:15:55 gold kernel: ivtv0: Registered device video24 for  
encoder PCM audio (1 MB)
Oct 28 23:15:55 gold kernel: ivtv0: Registered device radio0 for  
encoder radio
Oct 28 23:15:55 gold kernel: ivtv0: Registered device video16 for  
decoder MPEG (1 MB)
Oct 28 23:15:55 gold kernel: ivtv0: Registered device vbi8 for  
decoder VBI (1 MB)
Oct 28 23:15:55 gold kernel: ivtv0: Registered device vbi16 for  
decoder VOUT
Oct 28 23:15:55 gold kernel: ivtv0: Registered device video48 for  
decoder YUV (1 MB)
Oct 28 23:15:55 gold kernel: ivtv0: loaded v4l-cx2341x-init.mpg  
firmware (155648 bytes)
Oct 28 23:15:55 gold kernel: ivtv0: Initialized Hauppauge WinTV  
PVR-350, card #0
Oct 28 23:15:55 gold kernel: ACPI: PCI Interrupt 0000:02:02.0[A] ->  
GSI 17 (level, low) -> IRQ 21
Oct 28 23:15:55 gold kernel: Installing spdif_bug patch: Audigy 2  
[SB0240]
Oct 28 23:15:55 gold kernel: ivtv:  ====================  END INIT  
IVTV  ====================

Thanks in advance! Please let me know if there's anything I can do to  
help debug this. I searched the archives and google but didn't find  
anything relavent.

Thanks!

-- 
Duncan Findlay

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