Genode 15.08 NOVA Demo Blank Screen

[Thotheolh Tay]

Hi,

I have not tried the workaround yet.

My environment is a LinuxMint 17.2 64 bit in VirtualBox with Qemu which is
the same as yours.


On Fri, Sep 4, 2015 at 9:26 PM, Norman Feske <norman.feske at ...1...>
wrote:

> Hi Thotheolh,
>
> On 04.09.2015 15:08, Thotheolh Tay wrote:
> > Do you need me to open a bug on the Github for this ?
>
> just out of curiosity, did my workaround work for you?
>
> I investigated the symptom a bit further by instrumenting Qemu
> (hw/input/ps2.c). The function 'ps2_mouse_event' is called with bogus
> arguments for dx and dy. It receives relative motion values in the order
> of thousands. Normally one would expect single-digit numbers. Qemu now
> tries to convert those values into a sequence of PS/2 packets. Because
> the values are so extreme, a flood of PS/2 packets is generated, which
> eventually triggers the overrun of an internal queue in our PS/2 driver.
> This would never occur at a normal rate of events. The problem stems
> from the fact that Qemu receives bogus motion events unless SDL's
> DGAMOUSE parameter is set to 0. I am afraid that we won't be able to
> solve or work around it within Genode. The problem lies somewhere in
> libSDL or Qemu. Hence, opening an issue at our issue tracker seems futile.
>
> I guess that the problem only occurs when executing Qemu within a guest
> OS. E.g., I am running Qemu on Linux inside VirtualBox. Is this similar
> to your setup?
>
> Cheers
> Norman
>
> --
> Dr.-Ing. Norman Feske
> Genode Labs
>
> http://www.genode-labs.com · http://genode.org
>
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