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Question Intermediate stalls with serial port at higher load (Xircom CEM56) 

Forum: Xircom PCMCIA Ethernet Adapter Issues
Date: 2000, Jun 27
From: Andreas Stuebinger andreas.stuebinger

I'm using linux-2.2.16 together with pcmcia-cs-3.1.16 on
a Scenic Mobile 710. The ethernet part is working well,
the serial part is well if working on small data transfers
or working interactivly.

But on trying to download some larger files (i.e. larger
than about 30kB) the connection seems to be interupted.
The connection stops, starts again, receives some data,
stops again, .... The overall transfer rate drops down
to about 1.5kB/s. 

There are no changes to serial.opts, in /var/log/messages
appear the following messages:


kernel: Linux PCMCIA Card Services 3.1.16
kernel:   kernel build: 2.2.16 #10 Fri Jun 23 14:46:24 CEST 2000
kernel:   options:  [pci] [cardbus] [apm]
kernel: PCI routing table version 1.0 at 0xf5ec0
kernel: Intel PCIC probe:
kernel:   Cirrus PD6832 rev c1 PCI-to-CardBus at slot 00:14, mem 0x68000000
kernel:     host opts [0]: [ring] [0/7/4] [3/17/4] [no pci irq] [lat 64/176] [bus 32/34]
kernel:     host opts [1]: [ring] [0/7/4] [3/17/4] [no pci irq] [lat 64/176] [bus 35/37]
kernel:     ISA irqs (scanned) = 3,4,7,11 polling interval = 1000 ms
cardmgr[717]: starting, version is 3.1.16
cardmgr[717]: watching 2 sockets
kernel: cs: IO port probe 0x0c00-0x0cff: excluding 0xcf8-0xcff
kernel: cs: IO port probe 0x0800-0x08ff: excluding 0x800-0x807
kernel: cs: IO port probe 0x0100-0x04ff: excluding 0x300-0x307 0x370-0x37f 0x398-0x39f 0x4d0-0x4d7
cardmgr[717]: initializing socket 1
kernel: cs: memory probe 0xa0000000-0xa0ffffff: clean.
cardmgr[717]: socket 1: Xircom CEM56 Ethernet/Modem
cardmgr[717]: executing: 'modprobe xirc2ps_cs'
kernel: xirc2ps_cs.c 1.31 1998/12/09 19:32:55 (dd9jn+kvh)
cardmgr[717]: executing: 'modprobe serial_cs'
kernel: eth0: MII link partner: 0021
kernel: eth0: MII selected
kernel: eth0: media 10BaseT, silicon revision 5
kernel: eth0: Xircom: port 0x320, irq 11, hwaddr 00:10:A4:D0:C5:B0
kernel: tty03 at 0x02e8 (irq = 11) is a 16550A
cardmgr[717]: executing: './network start eth0'
kernel: eth0: MII link partner: 0021
kernel: eth0: MII selected
kernel: eth0: media 10BaseT, silicon revision 5
cardmgr[717]: executing: './serial start ttyS3'


Thanks a lot for any help

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