Mark Spencer wrote:
I am having trouble getting the te410p to work with a serial console.  Has
anyone else had this problem?  Am I doing somthing wrong? Interupt
problem? Is this a bug?


The serial console likely is blocking interrupts for too long when it
engages.  Zaptel requires interrupts be serviced 1000 times per second,
for an interrupt latency of < 1ms max.  Generally this is not a problem,
but some systems in linux (e.g. IDE if DMA is enabled, Framebuffer
console, etc) block interrupts for exceptionally long periods of time,
thus causing this sort of problem.

[Snip...]


I guess in the case of IDE DMA, using hdparm -u1 would remove the interrupt blocking. DMA on IDE disks is a nice thing to have...

Richard

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