On 09/26/12 21:42, Keith Pyle wrote:
I recently purchased a Hauppauge HD-PVR (the 1212 version, label on
bottom 49001LF, Rev F2). I have consistent capture failures on Linux
where data from the device simply stops, generally within a few
minutes of starting a capture. Yet, the device works flawlessly on
Windows with the same USB and component cables, same power supply, and
same physical position. This suggests that the device itself has
acceptable power, is not overheating, etc. I'll detail below the
testing I've done thus far and would appreciate any suggestions on how
to further test or address the problem.
The good news is that I have a highly reproducible failure on Linux,
but then that's the bad news too.
Thanks.
Keith
-- Linux tests --
I started trying to use the HD-PVR directly with my MythTV backend. I
have subsequently switched all of my testing to simple direct captures
from the /dev/video? device using /bin/cat to eliminate as many
variables as possible.
I've done a large number of tests with combinations of the following:
OS: gentoo 3.4.7, gentoo 3.5.4
HD-PVR firmware: 1.5.7.0 (0x15), 1.7.1.30059 (0x1e)
Input resolution: fixed to 720p, fixed to 1080i, floating based on input
USB ports: motherboard ports on Intel DP45SG, motherboard ports on MSI
X58 Pro-E, ports on SIIG USB PCIe card
Captures fail consistently.
Here's some interesting new information. On noticing that the 3.6
kernel included several USB related commits, I updated the kernel of my
test system (MSI X58 Pro-E) from 3.5.4 to 3.6.2. I ran a series of
capture tests with firmware 0x1e and all other variables exactly as
before - same USB cable, port, physical position, etc. I have 20
successful 1-hour captures and 1 failure. There are no logged messages
for the failed capture but the timing coincides within a minute after
initializing a wireless joystick on a different USB bus. I've been
unable to reproduce this failure, so I cannot conclusively state that
there is a correlation.
The results of the kernel change are dramatic. Under 3.5.x and earlier,
the failure rate for 1-hour captures was 100%. Most failed in less than
10 minutes. There were some instances of hard hangs on the HD-PVR
(i.e., power cycle required). With 3.6.2, it is less than 5% failure.
The one failure was a truncated recording.
I am continuing capture tests on my test system to build more data. I
will next be updating my MythTV backend to 3.6 and trying the capture
tests on it since it has a different motherboard.
It would be quite interesting if others with HD-PVR problems see similar
results for 3.6.2 or better.
Keith
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