Re: [Hampshire] Ubuntu 9.10, dvb and dual boot

On 01/18/2010 08:27 AM, Philip Stubbs wrote:
> 2010/1/17 Leo<linux@???>:
>
>> Is anyone out there using a digital TV card on Ubuntu 9.10 and also dual
>> booting with windows? If so do you find that after switching back from
>> Windows to Ubuntu the TV card doesn't work, and you have to reboot again
>> into Ubuntu?
>> If not, can anyone tell me how I'd go about finding out what's changed
>> between 9.04 and 9.10 in terms of dvb firmware, drivers and dvbstream
>> between the two version of Ubuntu, so that I could try and figure out
>> what's broken.
>>
> When I first started using my USB dvb dongle, I had the opposite
> problem. It would only work if I loaded Windows, then rebooted into
> Linux. It turned out that I did not have the correct firmware in
> Linux. From my experience, it sounds like the firmware loaded by
> windows is not the same as the one loaded by Linux. Is it possible to
> up/down grade the windows driver so that it matches the Linux one?
>
>

Different and incompatible firmware is probably the the issue. If you
re-boot (rather than power off) the device will remain powered, so the
firmware will still be loaded once you change OS.

A short term work around would be to power off your machine, then switch
on again. This will ensure that the device is powered down and so a new
firmware load will occur. To compare the difference in firmware:

Check /var/log/messages (assuming that is the right file on debian, it
is for redhat) for dvb output to identify the firmware file being loaded.
Find that file, and diff between 9.10 and 9.04