Date: Thu, 25 Dec 2003 19:34:14 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: dhee@myrealbox.com Cc: freebsd-current@freebsd.org Subject: Re: Serial driver problems with 5.2-current Message-ID: <20031225.193414.72476823.imp@bsdimp.com> In-Reply-To: <1072398918.7cddfbe0dhee@myrealbox.com> References: <1072398918.7cddfbe0dhee@myrealbox.com>
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In message: <1072398918.7cddfbe0dhee@myrealbox.com>
"Dheeraj" <dhee@myrealbox.com> writes:
: i see the following problems in my dell notebook.
what kind of Dell notebook? I have a Inspiron 8000.
: i just added a simple makefile in src/sys/modules to make it a
: module. (else it won't boot at all )
This sounds like an interrupt routing problem of some sort. I too
have a sio module, and it works great for me.
kldload sio for me yields:
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
Expected.
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
Also expected since I don't have a COM2 on this laptop.
sio4: <3Com Megahertz 3CXEM556> at port 0x110-0x117 irq 10 function 1 config 39 on pccard1
So mine has a 3CXEM556 card, not the slightly newer 3CCFEM556B (I'm
not sure if my fast ethernet 556 is a normal or a 'B').
sio4: type 16550A
sio4: unable to activate interrupt in fast mode - using normal mode
This looks normal. Now, let's take a look at yours:
: Dec 25 19:33:10 vagisha kernel: sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa
: 0
: Dec 25 19:33:10 vagisha kernel: sio0: type 16550A
: Dec 25 19:33:10 vagisha kernel: sio1 at port 0x2f8-0x2ff irq 3 on isa0
: Dec 25 19:33:10 vagisha kernel: sio1: type 16550A
Standard COM0 and COM1.
: Dec 25 19:33:10 vagisha kernel: sio4: <3Com Megahertz 3CCFEM556B> at port 0x120-0x127 irq 11 function 1 config 39 on pccard1
This looks like a card I recently got working (but I don't have the
dongle for the modem). Like I said above, can't recall if mine is a
'B' or not.
: Dec 25 19:33:10 vagisha kernel: sio4: type 16550A with a buggy IIR_TXRDY implementation
This is odd. I really don't recall seeing this message at all (and I
don't get it with the older 3cxem556 I'm using while traveling).
: Dec 25 19:33:10 vagisha kernel: sio4: unable to activate interrupt in fast mode - using normal mode
This is 'normal' for pccard modems.
: --- and i have to use the power button to reboot.
What happens if you don't have the 3com card installed.
: If i compile a custom kernel with serial driver disabled, it works fine.
Define: 'works fine' What are you seeing?
Also, when it hangs, can you break to the debugger (add options DDB
and BREAK_TO_DEBUGGER in your kernel)? If so can you do a 'show
intrcnt' to see what interrupt is being 'hammered'. It will likely be
the only one larger than rtc :-). If you are having trouble, continue
and break again a second or two later. Chances are good that it will
be the one that has > 100 more than the last one (and likely > 1000 or
10000!). It likely won't be irq 11. You might also try breaking at
siointr.
Warner
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