[6110] in linux-scsi channel archive
PROBLEM: PPP stalls when CDROM is active
daemon@ATHENA.MIT.EDU (Lars Christensen)
Thu Mar 18 01:03:25 1999
Date: Wed, 17 Mar 1999 21:41:33 +0100 (MET)
From: Lars Christensen <larsch@cs.auc.dk>
To: linux-scsi@vger.rutgers.edu, longyear@pobox.com
I have a combined problem with PPP connections and IDE-SCSI emulation -
here is my problem description:
[1.] PPP stalls when CDROM is active
[2.] I have 2 ATAPI CDROM drives installed in my computer, one 32 speed
regular drive and one 4 speed Yahama 4001t CDROM Writer. I use SCSI
emulation for both drives. When I either read (using dd) or write (usinged
cdrecord) from/to the Yahama CDWriter, my PPP connection to the Internet
stalls. Any existing connection over the PPP connections stops sending and
receiving data when I access the CDROM drive. As soon as I stop the CD
access, the network connection resumes. Everything seems affected
(udp/tcp).
- There is no such problem when i access my regular CDROM drive
(reader only).
- The local network does not seem to be affected although I can only check
the loopback address and my local ethernet address as I'm not connected to
any network right now.
- No errors occur reading or writing CD's - it simply just blocks the
network connections.
- The CPU is not exhausted - my rc5 client (can) crack away while burning.
[3.] scsi-modules, (PPP) networking,
[4.] Linux version 2.2.3 (root@charon.s.cs.auc.dk) (gcc version 2.7.2.3)
#4 SMP sat mar 13 23:01:26 CET 1999
[5.] n/a
[6.] n/a
[7.]
[7.1.] Dump from ver_linux
Linux charon.s.cs.auc.dk 2.2.3 #4 SMP lør mar 13 23:01:26 CET 1999 i686
unknown
Kernel modules 2.1.121
Gnu C 2.7.2.3
Binutils 2.9.1.0.15
Linux C Library 2.0.7
Dynamic linker ldd (GNU libc) 2.0.7
Linux C++ Library 2.8.0
Procps 1.2.9
Mount 2.8a
Net-tools (1999-01-01)
Kbd 0.96
Sh-utils 1.16
[7.2.] Dump from /prov/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 5
model name : Pentium II (Deschutes)
stepping : 1
cpu MHz : 348.490383
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov
pat pse36 mmx osfxsr
bogomips : 347.34
[7.3.] /proc/modules
nls_iso8859-1 2024 0 (autoclean)
sr_mod 16944 0 (autoclean)
cdrom 11600 0 (autoclean) [sr_mod]
isofs 17100 0 (autoclean)
ide-scsi 6708 0
scsi_mod 36916 2 [sr_mod ide-scsi]
ppp 18456 2 (autoclean)
slhc 4224 1 (autoclean) [ppp]
3c59x 17520 1 (autoclean)
sound 56636 0 (unused)
soundcore 2412 3 [sound]
[7.4.] /prov/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: PIONEER Model: CD-ROM DR-A14S Rev: 1.04
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: YAMAHA Model: CRW4001 Rev: 1.0e
Type: CD-ROM ANSI SCSI revision: 02
[7.5.] The devices for the drives are /dev/scd0 for the CD reader and
/dev/scd1 for the CD writer.
/Lars Christensen
larsch@cs.auc.dk
http://www.cs.auc.dk/~larsch
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
