[Qemu-devel] VNC problems

[Qemu-devel] VNC problems

[Blue Swirl]

Hi,

There are some problems with VNC on Sparc64 and PPC targets, the
client can't to connect to the server. If I stop the CPU with -S flag,
the client connects successfully. For some reason i386 and Sparc32 do
not have this problem.

Most of the VNC clients I tried disconnected with "Rect too large:
800x600 at (0, 0)", only RealVNC 4.1.1 could handle it.

Re: [Qemu-devel] VNC problems

[Mark Cave-Ayland]

Blue Swirl wrote:

> Hi,
> 
> There are some problems with VNC on Sparc64 and PPC targets, the
> client can't to connect to the server. If I stop the CPU with -S flag,
> the client connects successfully. For some reason i386 and Sparc32 do
> not have this problem.
> 
> Most of the VNC clients I tried disconnected with "Rect too large:
> 800x600 at (0, 0)", only RealVNC 4.1.1 could handle it.

I think this is being caused by an incorrect machine instruction 
somewhere. From my debugging here, I see that when booting the Sparc64 
image, gdb gets stuck in a loop somewhere in cpu_exec() in 
vl.c:main_loop() and so never makes it down to vl.c:main_loop_wait() to 
process the VNC events.

Does anyone have any HOWTOs/clues/debugging resources for qemu to help 
when trying to troubleshoot these kinds of low-level problems?


ATB,

Mark.

-- 
Mark Cave-Ayland
Sirius Corporation - The Open Source Experts
http://www.siriusit.co.uk
T: +44 870 608 0063