[driverloader] Re: [hsflinux] Modem dropping connection under high CPU load

Linuxant support (Jonathan) support at linuxant.com
Fri Jun 11 16:24:29 EDT 2004


this is a known issue. The driver must process a lot of data that came from 
the modem and must do this operation in real time and since Linux is not a 
real time operating system, if there is excessive CPU loading that prevents 
the driver kernel thread from running at a regular interval, the connection 
will break.

As you suggested, you should try to use the 'nice' command on programs that 
might require a lot of CPU cycles to run.


Technical specialist / Linuxant
support at linuxant.com

On Sunday 06 June 2004 19:02, Richard Harwood wrote:
> Hi folks,
> Just wondering if anyone else has come across this problem.
> 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
> occur:
> kernel: spurious 8259A interrupt: IRQ7.
> kernel: Conexant: TX FIFO UNDERRUN (Bus Latency) - FIFOE
> Any suggestions would be greatly appreciated!
> Richard
> _________________________________________________________________
> MSN Toolbar provides one-click access to Hotmail from any Web page  FREE
> download! http://toolbar.msn.click-url.com/go/onm00200413ave/direct/01/
> _______________________________________________
> hsflinux mailing list
> hsflinux at lists.linuxant.com
> https://www.linuxant.com/mailman/listinfo/hsflinux

More information about the driverloader mailing list