Thank you Bug! for your reply,
The three devices using IRQ 5 are:
Sound card on main board:
00:06.0 Multimedia audio controller: ESS Technology ES1968 Maestro 2
Subsystem: Compaq Computer Corporation: Unknown device b0b8
Flags: bus master, medium devsel, latency 64, IRQ 5
I/O ports at 2000
Ethernet controller card on PCI bus:
00:03.0 Ethernet controller: Lite-On Communications Inc LNE100TX (rev 20)
Subsystem: Lite-On Communications Inc LNE100TX
Flags: bus master, medium devsel, latency 66, IRQ 5
I/O ports at 2800
Video card on AGP (=PCI?) bus:
01:00.0 VGA compatible controller: 3Dfx Interactive, Inc. Voodoo Banshee (rev 03)
(prog-if 00 [VGA])
Subsystem: Guillemot Corporation Maxi Gamer Phoenix
Flags: VGA palette snoop, 66Mhz, fast devsel, IRQ 5
Memory at 40000000 (32-bit, non-prefetchable)
Memory at 42000000 (32-bit, prefetchable)
I/O ports at 1000
Capabilities: [54] AGP version 1.0
I'm using X4.0.2 with DRI enabled. According to the log files and
glxinfo the card is HW accelerated. However, even though Q3A and gears
run OK, HG2, Heretic2, UT does _not_. Do the Banshee (tdfx) driver
require an IRQ? If not everything should be OK, or can three devices
share the same IRQ? W98 on the same computer have no problems with
three devices at IRQ5.
Further comments below.
Thanks,
Svante
Bug Hunter writes:
>
> If you have PCI cards, IRQ sharing will work.
>
> Otherwise, you may have to force the card not to be PNP and then tell it
> what IRQ to be on. You usually have to run the DOS setup disk to get this
> to happen.
I've not found any option to control the PNP behavior in the BIOS. Do
the IRQ steering apply to ISA cards? This computer does not have
any ISA slots :(
>
> On Fri, 29 Dec 2000, Svante Signell wrote:
>
> > Anyone knows how IRQ 5 is chosen both for my eth0 (tulip, external
> > card) driver and sound (maestro, on motherboard) on my Compaq Presario
> > 5640/5670 when other interrupts are available: 4,6,7,9,10,11?
...
> > How to steer away one of the units from IRQ 5 to avoid interrupt
> > sharing/conflicts? In the documentation to both the tulip and maestro driver I
> > have not found any option to control the IRQ. What unit takes care of
> > allocating IRQ's if the card driver does not require one, the kernel
> > or the BIOS?
> >
> > The BIOS for this computer has very limited number of options, and as
> > mentioned above the sound hardware is on the motherboard. Also only
> > two PCI slots are available (one with the ethernet card, the other
> > with a PCTV card, IRQ 3), so shuffling cards is not much to try.
> >
>
