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[linux-dvb] Re: ARM crashing again
Am Freitag, 27. Februar 2004 22:58 schrieb Gregor Lawatscheck:
> Rev 1.3 and rev 1.5 FF cards have a problem with replaying only, when no
> signal is attached to the tuner! Rev 1.6 and later are fine. I believe
With replaying yes, definitely - but i had ARM crashes also with a signal
connected, with all versions of drivers.
So if the 1.3 cards have a problem it's always there, just with different
propability of appearance.
> > Has someone already made such tests?
>
> Yes, not as thoroughly but I remember I replayed the same samples of
> video-only data in a loop for a couple of hours and made it crash with
> no signal attached to the FF-card. It were short samples of very likely
> 100% perfect data but I wouldn't know how to verify that a sample is
> perfect. I used both mplayer and vdr with the same results.
That lease 3 possibilties:
1. the data are modified by the driver before sent to the hardware
(MPEG->AVPES?) maybe that fails under rare conditions
2. the firware fails under rare conditions
3. it is a hardware problem
"Optically" the problem appears as following:
The error appears in case of playback if the playmode is changed by vdr, e.g.
jumping between scenes, slow-forwared, pause etc.
The video and audio disappear and instead green stripes are painted mostly in
the upper part, sometimes smaller versions/parts of the video appear as a
stillframe (upper left), often a small audio sample is played in an endless
loop - which isn't funny if it is the sound of an explosion ;-)
Then the firmware gets reloaded several times, but that doesn't help at all,
if the watchdog-timer of vdr fires my scripts reload the driver completly and
_that_ helps. so something initialised at a complete driver reload get's
overwritten in firmware or driver.
That should close up the range where the problem lays a lot.
Guido
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