Messages in this thread | | | From | Rob van Nieuwkerk <> | Subject | Re: IDE + SMP Lockup (no OOPS) in 2.2.12, 2.2.10 | Date | Mon, 4 Oct 1999 01:44:03 +0200 (CEST) |
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Rogier Wolff wrote:
> Ok, sure, of course. I know that. However as 99% of the users won't be > reading enough manuals to do the hdparm -u1, it is still neccesary to > find out why the 128-byte-fifo-uart is losing characters, while the > standard 16-byte-fifo-uart isn't. > > Turns out the trigger level on the new UART was set at 112. That's 16 > before the end. Reducing the trigger level 32, fixed a lot, but still > I was able to overrun the new uart at 19k2, while I couldn't overflow > the 16550 at 115k2.
Hi,
Something related:
Since I've switched to 2.2.x from 2.0.36 I see serial overruns on my modem-link (something like every minute during a download). Yes, I know about "hdparm -u1" ..
Same hardware, same config, same software. Only different kernel. I have *never* seen any overrun with 2.0.x. It happens on a Cyrix 486 DX2/66 and not on an Intel 486/33. I have never been able to trace the problem. It's weird.
I can dig up detailed bug-reports I sent to linux-kernel some time ago (never got any response) in case anyone is interested.
greetings, Rob van Nieuwkerk
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