Rebooting problems with /dev/cxm0
R. B. Riddick
arne_woerner at yahoo.com
Wed Apr 19 05:46:24 UTC 2006
--- Erin E Conn <econn at nc.rr.com> wrote:
> I do not think it is a resource issue, as the device works fine in
> Windows using the provided WinTV software. Has anyone else experienced
> similar issues with this card or any suggestions for remedying this problem?
I had a similar problem with my Pentium 133MHz:
When I used "cat /dev/cxm0" and piped it via a NIC to another box, the pvr box
halted without rebooting (at least for some minutes - then i pushed the reset
button). Somehow it felt like the read requests from /dev/cxm0 must be issued
quite often and regularily and the read requests from /dev/cxm0 should not be
limited in size (1MB works fine, while 1 byte crashes almost immediately (e. g.
"dd if=/dev/cxm0 of=/dev/null bs=1 count=1000"))... Furthermore the power
saving features should be disabled in my box, I think (I did not test it
thoroughly - at least whenever the power saving started the box crashed, when I
read from /dev/cxm0 at that time)... :-)
Since I split the reading from cxm0 and transfering to hard disc (partially via
network) in two processes, that use 8 or about 8 buffers (each 2MB or about
2MB), I do not have this problem (61 days uptime... :-)) And each day at least
3h of reading from /dev/cxm0 - at most days much more: 6h or so).
Maybe that helps (e. g.: just try to do "dd if=/dev/cxm0 of=/dev/null bs=1m
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