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Date: Sun, 21 Jan 2001 17:25:59 +0100 (CET)
To: [EMAIL PROTECTED]
Subject: Teles 16.3 in AXP noname
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From: [EMAIL PROTECTED] (Andreas Buschmann)
Delivered-To: [EMAIL PROTECTED]
Package: kernel? modconf?
Version: 2.2.17 0.2.26.14?
Architecture: alpha
When trying to add a Teles 16.3 ISDN card to my Alpha noname, modconf
hangs my computer after entering the configuration.
The ISA configuration from the SRM console:
>>>isacfg -slot 3 -dev 0
=============================================================
handle: Teles-16.3
etyp: 1
slot: 3
dev: 0
enadev: 1
totdev: 1
iobase0: 180 iobase1: 8000000000000000
iobase2: 8000000000000000 iobase3: 8000000000000000
iobase4: 8000000000000000 iobase5: 8000000000000000
membase0: 8000000000000000 memlen0: 8000000000000000
membase1: 8000000000000000 memlen1: 8000000000000000
membase2: 8000000000000000 memlen2: 8000000000000000
rombase: 8000000000000000 romlen: 8000000000000000
dma0: 80000000 irq0: a
dma1: 80000000 irq1: 80000000
dma2: 80000000 irq2: 80000000
dma3: 80000000 irq3: 80000000
=============================================================
The actual hangup:
root@atacama> modconf
...
mtype=3 io=0x180 irq=10 protocol=2 id=isdn0
...
Installing module hisax. If the device isn't there, or isn't configured correctly,
this could cause your system to pause for up to a minute.
ISDN subsystem Rev: 1.100/1.84/1.114/1.63/none/1.4 loaded
Teles 16.3: IRQ(10) getting no interrupts during init 1
And now the computer hangs, and needs a reset.
I have found, that this hangup resulted from an interrupt conflict
between the Teles ISA card on irq 10, and the PCI VGA card which also
takes irq 10. It can be resolved by removing one of the two cards or
finding an interrupt of the set (5, 9, 10, 12, 15), which can be
reassigned to the Teles card.
The irq of the VGA card does not show up in /proc/interrupts:
root@atacama> cat /proc/interrupts
1: 0 keyboard
4: 2033 +serial
5: 8 +serial
8: 2581088 timer
11: 8279 ncr53c8xx
15: 11052 DE200 (eth0)
but in /proc/pci
root@atacama> cat /proc/pci
PCI devices found:
Bus 0, device 6, function 0:
Non-VGA device: NCR 53c810 (rev 1).
Medium devsel. IRQ 11. Master Capable. Latency=255.
I/O at 0x8000 [0x8001].
Non-prefetchable 32 bit memory at 0x4200000 [0x4200000].
Bus 0, device 7, function 0:
Non-VGA device: Intel 82378IB (rev 3).
Medium devsel. Master Capable. No bursts.
Bus 0, device 8, function 0:
VGA compatible controller: S3 Inc. Trio32/Trio64 (rev 84).
Medium devsel. IRQ 10.
Non-prefetchable 32 bit memory at 0x14000000 [0x14000000].
This seems like a bug in the design of the PC hardware.
It might be possible test for this sort of conflict.
If it is not possible a warning should be added to the documentation
of the ISDN cards to watch out for interrupt conflicts.
Anyway, it seems very difficult to add an ISA ISDN card to a PCI + ISA
PC like motherboard as there are usually no free interrupts:
IRQ: Device:
0 reserved
1 keyboard
2 same as IRQ 9
3 COM2
4 COM1
5 COM3 or other, sometimes available
6 floppy
7 LPT1 sometimes reasignable
8 timer
9 COM4 or other, sometimes available
10 VGA often not assignable
11 SCSI (NCR or Adaptec)
12 mouse often not assignable, was free in old ISA PCs
13 math error
14 IDE hd
15 IDE hd or ethernet
Tschuess
Andreas
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From: Herbert Xu <[EMAIL PROTECTED]>
Date: Tue, 23 Jan 2001 07:27:40 +1100
To: [EMAIL PROTECTED]
Subject: Re: Bug#83154: Teles 16.3 in AXP noname
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References: <m14KNJX-0001zUC@kalahari>
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In-Reply-To: <m14KNJX-0001zUC@kalahari>; from [EMAIL PROTECTED] on Sun, Jan 21,
2001 at 05:25:59PM +0100
Delivered-To: [EMAIL PROTECTED]
On Sun, Jan 21, 2001 at 05:25:59PM +0100, Andreas Buschmann wrote:
>
> It might be possible test for this sort of conflict.
That is best done in user space.
> If it is not possible a warning should be added to the documentation
> of the ISDN cards to watch out for interrupt conflicts.
modconf should already warn you about the possibility of a system hang
when installing a module.
--
Debian GNU/Linux 2.2 is out! ( http://www.debian.org/ )
Email: Herbert Xu ~{PmV>HI~} <[EMAIL PROTECTED]>
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