[hsflinux] Modem dropping connection under high CPU load

Axel Müller axel.mueller at avanux.de
Mon Feb 14 16:37:42 EST 2005


I'm having the same problem using a Dell Inspiron 8200.
Did you find a solution?

Best regards,


>I have an HSF modem in a Dell Inspiron 5150 laptop and a registered copy of 
>the modem drivers from Linuxant.

>Everything works well apart from the modem will drop the line often when the 
>CPU load is high. "High" can be anything from just surfing a few web sites 
>to running a niced-down distributed application in the background.

>This is with the latest HSF driver on the site. I'm tried this on an older 
>kernel and a newer kernel and the results are about the same. I've tried 
>tweaking every kernel parameter I can think of to improve matters but it 
>makes no difference. I thought it may have to do with power management 
>because the 5150 is notoriously bad at this. Anyway, I have the latest BIOS 
>update from Dell on here too.

>The following gets logged in /var/log/messages when a hangup is about to 

>kernel: spurious 8259A interrupt: IRQ7.
>kernel: Conexant: TX FIFO UNDERRUN (Bus Latency) - FIFOE

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