9750 vs. blade3D gives freaky ttyS3 problem)

9750 vs. blade3D gives freaky ttyS3 problem)

[Lee Brown]

Dear smart people on the kernel mailing list:

I have celeron 300 MHz box (overcl'ked to 450)
I am running 2.4 test11.
ISA PnP enabled.
I am using the fbconsole(VESA VGA).
I have a tried and true serial modem.

When I put in a Trident 975AGP the /dev/ttyS3 (modem)  works fine. I can tell
this because the response to minicom is snappy and KPPP works(after I startx).

When I remove the 975 and install my new Trident Blade3D (9880) I have
different results.  When I run minicom
1)  The initialization box appears.
2) The box then disappears (as it supposed to)
3) I wait several seconds
4)  The initial string _crawls_ across the screen and finally gives me OK

Why am I getting sluggish (to the point where I can't use the modem) response
with this second setup?  the 975 and the Blade3D are very similar I imagine.
And what is the connection between a video card and the serial port?

If you need any more system info I'll be glad to give it.

(Please CC me as I am not on the List)
Thank You Ahead.
-- 
Lee Brown Jr.
leejr@i-plus.net

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Re: 9750 vs. blade3D gives freaky ttyS3 problem)

[Lee Brown]

> On Thu, 30 Nov 2000, tytso@mit.edu wrote:
 > At a guess, it's an IRQ conflict.  The Blade3D card may be trying to
 > use the same interrupt as the serial port, and that's probably what's
 > causing problems.
 
 1) You nailed it.   IRQ 3 was the culprit.  Why I  assumed my
 box was PnP compatible I don't know (I guess I'm an optimist), but  I will not
 be fooled again.
 
 2) Thanks for answering.  You just made my good guy list ;-)

-- 
Lee Brown Jr.
leejr@i-plus.net

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