Hello All,
I have finally spent time to figure out what happened to suspending
with my bttv card. I have traced it to this patch:
msp3400: convert to the new control framework
ebc3bba5833e7021336f09767347a52448a60bc5
This was done by reverting the patch at the head for v2.6.39-git.
The patch seems to cause intermittent suspend issues. When I suspend
and come back, I will typically see this message:
tuner-simple 0-0061: i2c i/o error B: rc == -6 (should be 4)
Roughly means that while trying to set the tuner frequency, the device
was not found. The radio will not work after this happens.
I could not bisect to this patch. It did not seem to be a problem with
2.6.36, but for whatever reason after 2.6.36 it happens more. Between
2.6.36 and 2.6.37rc1 is an oops nightmare. Overall it is intermittent,
requiring multiple suspends to check for it. Roughly, the best way to
reproduce is:
fm on
fm <select frequency>
# Leave on for a while
fm off
Another patch of interest is:
0310871d8f71da4ad8643687fbc40f219a0dac4d
I have reverted both patches on 2.6.38 and will continue to monitor.
But I will need help to debug the problem as I do not know what the
new control framework is supposed to do, nor do I know how this tuner
actually works.
03:07.0 Multimedia video controller: Brooktree Corporation Bt878 Video
Capture (rev 02)
Subsystem: Avermedia Technologies Inc Device 0001
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium
>TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 32 (4000ns min, 10000ns max)
Interrupt: pin A routed to IRQ 21
Region 0: Memory at fdcff000 (32-bit, prefetchable) [size=4K]
Kernel driver in use: bttv
Kernel modules: bttv
03:07.1 Multimedia controller: Brooktree Corporation Bt878 Audio
Capture (rev 02)
Subsystem: Avermedia Technologies Inc Device 0001
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium
>TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 32 (1000ns min, 63750ns max)
Interrupt: pin A routed to IRQ 5
Region 0: Memory at fdcfe000 (32-bit, prefetchable) [size=4K]
tuner_simple 12197 1
tuner_types 7925 1 tuner_simple
tuner 18612 1
tvaudio 21521 0
tda7432 3288 0
msp3400 24324 0
bttv 99134 0
i2c_algo_bit 4216 2 radeon,bttv
rtc_cmos 8450 0
v4l2_common 4823 5 tuner,tvaudio,tda7432,msp3400,bttv
rtc_core 12257 1 rtc_cmos
videodev 55859 6 tuner,tvaudio,tda7432,msp3400,bttv,v4l2_common
i2c_piix4 8436 0
rtc_lib 1710 1 rtc_core
videobuf_dma_sg 6696 1 bttv
videobuf_core 13063 2 bttv,videobuf_dma_sg
btcx_risc 2655 1 bttv
rc_core 12201 1 bttv
parport 24443 2 ppdev,parport_pc
tveeprom 10497 1 bttv
Jesse
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