Peter Lueg wrote :
> Hi,
> 
> I use a 2.4.13-ac5-rmk2 Kernel on an ARM-Platform.
> 
> When I connect 2 ARM's with the following commands:
> ARM1:
> irattach /dev/ttySA2 -s 1
> pppd /dev/irnet 115200 noauth
> ifconfig ppp0 10.0.0.1 dstaddr 10.0.0.2 up
> 
> ARM2:
> irattach /dev/ttySA2 -s 1
> pppd /dev/irnet 115200 noauth 10.0.0.2:10.0.0.1
> ifconfig ppp0 10.0.0.2 dstaddr 10.0.0.1 up
> 
> a ftp-connection works normally fine.
> By binaries files is my transferrate >18KB/s.
> by bz2 or gz files is my transferrate <2KB/s and I becomes the 
> "VJ uncompressed error"-error message.
> when I started pppd with 'novj'-option no error message occurs 
> but the transfer is still <2KB/s.
> 
> Did somebody know what the problem is?
> 
> regards
> Peter

        Hum... I've never seen this error message with irtty, nsc-ircc
and usb-irda on i386. 16 kb/s is a bit slow for SIR, but not totally
unexpected (note : PPP can't compress already compressed frames). It
would look like you have some reliability problem (frame
corrupted/lost).
        I'm not familiar with the ARM platform, but I believe that
what you may want to use if the sa1100_ir driver instead of irtty. You
should ask Russel for more.
        Check also if disabling compression (deflate & bsd)
helps. Those sucks CPU and might cause dropped char on the serial
line.
        Also, please send a dump of /proc/net/irda/irlap on both end
to make sure things are proper.

        Good luck...

        Jean
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