Thanks for the help Lisa. The card worked for about a year without one issue so 
I figured it was a hardware issue. I know one of my updates could have caused 
an issue. I haven't added any new hardware as well so I don't think it's not an 
IRQ issue.

>What is your distro and kernel version?  Are your kernel patches up to 
date?
I'm running two versions of Ubuntu with one being 10.04 for my home PC and 9.10 
for my mythtv. Ultimately, I need the additional serial port in my mythtv PC. 
Kernels are 2.6.31-20-generic for 9.10 and 2.6.32-22-generic for 10.04. I tried 
the new serial card in both PCs and it doesn't work in either.

>What is the name and serial number of the card?  Have you 
researched drivers for your distro?
Info on my new card is very bleak as I've found nothing on the numbers given in 
lspci 5372:6872.

--- On Tue, 5/11/10, Lisa Kachold <[email protected]> wrote:

From: Lisa Kachold <[email protected]>
Subject: Re: Udev rules and built-in kernel modules
To: "Main PLUG discussion list" <[email protected]>
Date: Tuesday, May 11, 2010, 2:54 AM



On Sun, May 9, 2010 at 3:50 PM, John <[email protected]> wrote:

My computer setup needs two RS232 (serial) interfaces. I have the motherboard 
one and I also have a separate PCI card (4348:3253). The separate card has been 
going on the fritz since sometimes it just stops working. I bought another PCI 
serial card and I thought I could swap them out. Unfortunately, the new card 
(5372:6872) doesn't load the serial kernel driver like the old card. When I do 
a lspci -v for the old card it says kernel driver=serial and for the new card 
nothing is listed. I do an udevadm for both and the old one says serial and the 
new one says serial8250. Not sure why it doesn't say serial8250 when I do a 
lspci -v for the new card. Can you write a udev rule to load the correct 
built-in driver? Also, I did a cat on the modules.builtin and it shows 
serial_core.ko, 8250.ko, 8250_pnp.ko, 8250_pci.ko. I thought I would see a 
serial.ko and serial8250.ko as well. Any suggestions or am I out of luck on the 
serial card?




An intermittant PCI card issue could actually be an IRQ or DMA, UART issue.  
What are your bios settings?  Have you verified that there is not a conflict?

There is a known UART bug (registered by Linus Torvalds) in Serial8250 

fix-serial-8250-UART_BUG_TXEN-test:

What is your distro and kernel version?  Are your kernel patches up to date?

What is the name and serial number of the card?  Have you researched drivers 
for your distro?



-- 
Office: (480)307-8707
AT&T: (503)754-4452 
Systems Engineer
www.ivedaxpress.com















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