Re: System hang with ATI x1600 or x300 video card installed

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On Mar 26, 10:11 am, rbadda...@xxxxxxxxx wrote:
On Mar 25, 5:36 pm, Tim Roberts <t...@xxxxxxxxx> wrote:

rbadda...@xxxxxxxxx wrote:
Hi All,
I'm having big trouble when ATI radeon x1600 or x300 video card is
installed on a system where our kernel mode device driver (uses
physical memory for some operations) is present. When I've this driver
installed on a system with ATI x1600 or x300, system is freezing after
~ 3 hrs. If I use different video cards, system works fine. If
uninstall our driver then there is no system freeze.

Interesting that the graphics card would make a difference. Are you DMAint
into the frame buffer? How big are your DMA transfers?
--
Tim Roberts, t...@xxxxxxxxx
Providenza & Boekelheide, Inc.

Hi Calvin & Tim,
Thank you for your reply.
I'm using DQ965 (intel santa rosa board) and I was able to reproduce
on Calitoga board also . If I use different video cards on the same
board there is no issue. I will try setting break points in our kernel
mode driver to see whether I get any control or not before the hang.
I'm not overclocking the system.

I'm using around 300K buffer in each iteration (total iterations 6
when AddDevice function is called). Our driver is built using NuMega
DriverWorks version 3.2.


I'm kind of isolated the issue.

In my AddDevice function I've the following subroutine:

void InitializeTimer()
{

LARGE_INTEGER duetime = {0};

// Set up the timer for entropy gathering.
KeInitializeDpc(&dpc, GetEntropy, NULL);
KeInitializeTimerEx(&timer, NotificationTimer);
KeSetTimerEx(&timer, duetime, INTERVAL, &dpc);

}

If I call the above function two times consequently it is hanging,
why? Please answer.

.

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