Re: 2.2.5 parallel port driver locks up the kernel

Riley Williams (rhw@MemAlpha.CX)
Thu, 22 Jul 1999 11:48:41 +0100 (GMT)


Hi Philip.

>> The kernel locked up at boot. I could not even use the
>> alt-sysrq key. I used printks to debug it further, and
>> isolate the problem.

>> Kernel 2.2.5 crashed right after the "printk ("5 " message in
>> probe_one_port in parport_pc.c in the drivers/misc directory.
>> It had been called from parport_pc_init using 0x378, irq[0],
>> dma[0]. My printer port hardware uses 0x378. It is an older
>> card, perhaps even of the XT era.

> It sounds as if the probe for EPP and/or ECP is upsetting
> something else in your system. You might be able to discourage
> this by putting something like `reserve=0x37b,5 reserve=0x778,8'
> on your kernel command line.

One obvious possibility is a network card occupying 0x360-0x37F as I
had on one of my computers...

Best wishes from Riley.

+----------------------------------------------------------------------+
| There is something frustrating about the quality and speed of Linux |
| development, ie., the quality is too high and the speed is too high, |
| in other words, I can implement this XXXX feature, but I bet someone |
| else has already done so and is just about to release their patch. |
+----------------------------------------------------------------------+
* ftp://ftp.MemAlpha.cx/pub/rhw/Linux
* http://www.MemAlpha.cx/kernel.versions.html

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