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Re: [Qemu-devel] [PATCH for 2.7] ui: fix refresh of VNC server surface
From: |
Daniel P. Berrange |
Subject: |
Re: [Qemu-devel] [PATCH for 2.7] ui: fix refresh of VNC server surface |
Date: |
Tue, 16 Aug 2016 17:30:07 +0100 |
User-agent: |
Mutt/1.6.2 (2016-07-01) |
On Tue, Aug 16, 2016 at 05:21:22PM +0100, Daniel P. Berrange wrote:
> In previous commit
>
> commit c7628bff4138ce906a3620d12e0820c1cf6c140d
> Author: Gerd Hoffmann <address@hidden>
> Date: Fri Oct 30 12:10:09 2015 +0100
>
> vnc: only alloc server surface with clients connected
>
> the VNC server was changed so that the 'vd->server' pixman
> image was only allocated when a client is connected.
>
> Since then if a client disconnects and then reconnects to
> the VNC server all they will see is a black screen until
> they do something that triggers a refresh. On a graphical
> desktop this is not often noticed since there's many things
> going on which cause a refresh. On a plain text console it
> is really obvious since nothing refreshes frequently.
>
> The problem is that the VNC server didn't update the guest
> dirty bitmap, so still believes its server image is in sync
> with the guest contents.
>
> To fix this we must explicitly mark the entire guest desktop
> as dirty after re-creating the server surface. Move this
> logic into vnc_update_server_surface() so it is guaranteed
> to be call in all code paths that re-create the surface
> instead of only in vnc_dpy_switch()
>
> Signed-off-by: Daniel P. Berrange <address@hidden>
> ---
>
> NB This should go into 2.5 & 2.6 stable branches too
>
> ui/vnc.c | 17 +++++++++--------
> 1 file changed, 9 insertions(+), 8 deletions(-)
And next time I'll make sure I committed all outstanding
chunks before sending the email :-)
Regards,
Daniel
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