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Message-ID: <4154884A.7020706@gnu.org>
Date: Fri, 24 Sep 2004 21:23:00 -0000
From: Andrew Cagney <cagney@gnu.org>
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To: Lan Zhang <Lan.Zhang@Zoran.com>
Cc: gdb@sources.redhat.com
Subject: Re: Remote communication error
References: <E65CD2CAB74C80498703D6EF7624BB4C4ACBC1@zmaex.zma.zoran.com>
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> Hi,
> 
> I set up a remote debug using USB port. I got some message like: Remote
> communication error: Connection timed out. And this can happen at the
> begin of the debug or after I already did some debug commands. But the
> whole remote debug works fine for the serial port. I think I didn't add
> USB interface correctly. Could anyone point me which code related to the
> remote communication error, and why this happens? 
> 
> Thanks a lot 

That it works with a simple serial device and not USB suggests a bug in 
the kernel or h/w.  GDB (assuming this is with a standard GDB) uses 
identical code to drive both devices.

You can use "(gdb) set debug serial" to see exactly what GDB is doing 
when it hangs.

ANdrew