On 21-04-08 13:12, Frantisek Rysanek wrote:Dear Everyone,
I'm dealing with an embedded PC motherboard that contains some custom circuitry (GPIO), accessible via an ISA IO range between 0x200 and 0x218. There's an interesting issue with this in recent Linux (tried 2.6.22.6 and 2.6.24.2): something probes IO port 0x211 on boot, which happens to be an add-on buzzer control port - effectively the kernel boot launches an accoustic alarm :-) Any ideas what this could be?
ISAPnP default read data port is close at 0x213...
I haven't checked but this also reminds me of sensor chips. Do you have sensor drivers builtin?