Sounds like a classic interrupt conflict 

Forum: PCMCIA Network Adapter Issues
Re: Question: Dual PCMCIA NIC system (Linksys plus NDC ) time outs and lost interrupts (Dale moberg)
Date: 2000, Jan 30
From: David Hinds <dhinds@pcmcia.sourceforge.org>

You have an interrupt conflict with some other device on irq 5. The PCMCIA-HOWTO actually even describes this exact scenario (where you've got two cards that each work separately, but together, only the first one works). -- Dave

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Ok: OK, I guess next time I will just ignore proc/interruptsI Re: Sounds like a classic interrupt conflict (David Hinds) Date: 2000, Jan 30 From: Dale moberg dmoberg

I did see that the case matched the HOWTO info, but I did not see any interrupt conflict in /proc/interrupt. (I now see I was too gullible about this info...) I changed the irq_list in the pcmcia start script, and got the second card to work. Maybe you should emphasize that the proc/interrupt info may miss a system's interrupt. I reread and found at the end the HOWTO's warning that I had missed (because pcmcia seemed to be probing ok in that it assigned IRQs and loaded...) "Depending on system design, an inactive device can still occupy an interrupt and cause trouble .." That was true here. Thanks

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