From: Erik Rull <erik.rull@rdsoftware.de>
To: kvm@vger.kernel.org
Subject: USB Transfer Rate with kvm-77
Date: Mon, 16 Mar 2009 19:53:45 +0100 [thread overview]
Message-ID: <49BEA039.4090203@rdsoftware.de> (raw)
Hello,
I'm currently testing Windows XP in a Linux host. I works well except the
USB transfer rate. Printers and USB Pen Drives can be connected and get
detected (I added host:auto...). My System only supports USB 1.1, the
transfer rate in plain linux is okay. In the Guest Windows, the transfer
rate is horribly slow! The transfer rate is ~ 2MB per Minute! This is far
below the slowest defined USB transfer rates (1,5MBit / sec!). The system
is nearly idle (in linux and windows) during the transfer.
What could be the reason for that? I tested it also on a USB 2.0 system,
same effect, but additionally the printers cause bluescreens within Windows :-)
I need some ideas where to start investigating. I tested several USB Pen
Drives (USB 2.0 capable), a USB DVD ROM Drive and two printers of different
manufacturers (HP, Canon). All at the same transfer rate :-(
It seems that there is a performance gap - but where?
Thanks a lot!
Best regards,
Erik
reply other threads:[~2009-03-16 18:53 UTC|newest]
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