> So, I'm wondering:
> 1. How many folks running Windows XP are experiencing this?
> 2. Has anyone found a solution?
> 3. Has anyone running Windows 7 (or 8 for that matter) seen this?
>
> Bill
Bill,
After I installed 2.4.4 onto my WinXP/SP2 machine I randomly experienced
the DRIVER_IRQL_NOT_LESS_OR_EQUAL blue screen event while running my
5000A and PowerSDR. Flex support suggested that I upgrade to SP3 (which
was long overdue) but this did not resolve the issue on my machine,
which by the way had never blue-screened since I built it back in 2007.
A screenshot of one mini-dump can be seen here:
http://www.w1aex.com/archive/aex_ohci1394.sys.jpg
At any rate, when I watched what was happening, it turns out my blue
screens were not random. They always happened with the Flex 5K powered
up, and as you mentioned, PowerSDR did not necessarily need to be
running for the event to occur. What seemed to trigger a blue screen in
my case was running any application that made heavy utilization of the
Creative soundcard installed in my system while the Flex was powered up.
The usual windows sounds were not problematic, but watching flash video
in a browser, playing music, or editing multimedia files with Camtasia
or audio with Adobe Audition after an operating session with the Flex 5K
would nearly always trigger a blue screen.
As it turns out, my SIIG firewire PCI card was sharing an IRQ with the
PCI-Express slot that the soundcard is installed in. Unfortunately, that
PCI-Express slot is wrapped into the bios and to control the soundcard's
features it must be installed in that slot. Shuffling the SIIG firewire
card to the other standard PCI slot resolved that particular conflict
but unfortunately, that PCI slot is shared with the video card and the
SATA ports, so a whole different series of blue screen events began to
occur when the Flex 5K was used. I did end up resolving the problem by
moving the SIIG firewire card back to the original slot and disabling
the Creative sound card. Then I bought a USB sound card (25 bucks) and
plugged that into a rear USB port and that was the end of the problem
for me. The USB sound card does not utilize an IRQ and the USB
controller has its own exclusive IRQ assignment. The end result is that
there are no more blue screen events no matter what I do while the Flex
is running.
It appears that the new Flex firewire driver is very demanding and the
WinXP ohci1394.sys driver has difficulty sharing resources while the
Flex is present on the firewire port. This was never an issue with the
old pre -2.4.4 Flex firewire driver. So, to answer your questions:
1. Yes, I have experienced this.
2. Yes, my solution was to make sure my SIIG firewire card had exclusive
use of an IRQ.
3. No, my Windows 7 machine does not exhibit any issue with version
2.4.4 or 2.5.3
Hope my struggles can help you out in some way Bill!
73,
Rob W1AEX
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