Re: Modem hangup

Hi,

you should make sure that:

1) That there are no processes which are trying to use 100% CPU and/or I/O.
2) There is not something else that put an excessive stain on the 
system. For example, a user reported in the past that enabling DMA for 
his hard drive did solve the problem.

It could also be a problem with the modulation code. Perhaps that trying 
to use one of the following init. strings will solve the problem. Each 
of these init. strings will select a different modulation. You should 
try out each of them until you find a stable one.

---
AT &F W1 +ER=1; +DR=1; +MS=V90,0
AT &F W1 +ER=1; +DR=1; +MS=V90,1
AT &F W1 +ER=1; +DR=1; +MS=V34,0
AT &F W1 +ER=1; +DR=1; +MS=V34,1
AT &F W1 +ER=1; +DR=1; +MS=V32B,0
AT &F W1 +ER=1; +DR=1; +MS=V32B,1
AT &F W1 +ER=1; +DR=1; +MS=V32,0
AT &F W1 +ER=1; +DR=1; +MS=V32,1
---

Regards,


Jonathan
Technical specialist / Linuxant
www.linuxant.com
[email protected]



Laurent Moil wrote:
> Hello,
> I've successfully installed the driver, the modem is recognized, my 
> connection is properly configured...
> 
> But every 3 minutes the modem hangs up and I've to reboot to get a 
> connection again.
> 
> /var/log/messages :
> 
> Mar 18 13:42:13 nestor kernel: Conexant: RX FIFO OVERRUN (Bus Latency) - 
> FIFOE<3>
> Mar 18 13:42:13 nestor kernel: Conexant: TX FIFO UNDERRUN (Bus Latency) 
> - FIFOE<3>
> Mar 18 13:43:26 nestor pppd[2625]: Modem hangup
> 
> I've got a full license.
> 
> System : fc5 with latest kernel (2.6.20-1.2300.fc5), xorg with nvidia 
> (not nv)
> 
> Laptop : dell inspiron 8200
> Modem :  Intel Corporation 82801CA/CAM AC'97 Modem Controller (rev 02)
> 
> .wvdial.conf :
> Modem = /dev/ttySHSF0
> ISDN = off
> Modem Type = Analog Modem
> Baud = 57600
> Init = ATZ
> Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
> ...
> Dial Command = ATM1L3DT
> 
> Of course, the modem works OK with XP and it worked beautifully with 
> older free driver on redhat 9.
> 
> Since July, I've tried different kernels - stk 16 because 4 stks crashed 
> my system, it doesn't now with latest release.
> 
> The hangup occurs whether with  kpp or gnome-ppp/wvdia
> 
> /etc/modprobe.conf :
> 
> install snd-via82xx-modem /bin/true # temporarily disabled by hsf - 
> conflicts with hsfmc97via
> install snd-intel8x0m /bin/true # temporarily disabled by hsf - 
> conflicts with hsfmc97ich hsfmc97sis
> install snd-atiixp-modem /bin/true # temporarily disabled by hsf - 
> conflicts with hsfmc97ati
> alias /dev/ttySHSF[0-9]* /dev/ttySHSF
> alias /dev/modem /dev/ttySHSF
> alias char-major-240 /dev/ttySHSF
> alias char-major-240-* /dev/ttySHSF
> options hsfserial serialmajor=240
> alias char-major-242 hsfosspec
> alias char-major-242-* hsfosspec
> alias /dev/hsfdiag hsfosspec
> alias /dev/hsfdiag* /dev/hsfdiag
> alias char-major-243 /dev/hsfdiag
> alias char-major-243-* /dev/hsfdiag
> options hsfosspec dcpmajor=242 diagmajor=243
> install /dev/ttySHSF /sbin/modprobe hsfpcibasic2; /sbin/modprobe 
> hsfmc97ich; /sbin/modprobe hsfmc97via; /sbin/modprobe hsfmc97ali; 
> /sbin/modprobe hsfmc97ati; /sbin/modprobe hsfmc97sis; [ -e 
> /lib/modules/`uname -r`/extra/hsfusbcd2.ko ] && /sbin/modprobe 
> hsfusbcd2; /sbin/modprobe snd_hda_intel; /bin/true
> alias symbol:cnxthwhda_probe hsfhda
> alias symbol:cnxthwhda_resume hsfhda
> alias symbol:cnxthwhda_suspend hsfhda
> 
> Any hints ?
> 
> Thanks.
> 
> Laurent Moineau
> 
> 
> 
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