[ kvm-Bugs-2907597 ] qemu vnc server clips at 2560x1600

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Bugs item #2907597, was opened at 2009-12-02 18:57
Message generated for change (Comment added) made by avik
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Category: qemu
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Matthew Colyer (mcsoccer)
Assigned to: Nobody/Anonymous (nobody)
Summary: qemu vnc server clips at 2560x1600

Initial Comment:
So I am running using the VESA driver to run an Ubuntu 9.10 guest at 2560x1600 (I had to modify the xserver-video-vesa package to remove an internal screen limit of 2048x2048 in the xorg vesa driver) and everything works great except that the qemu vnc server appears to clip at this resolution. The problem goes away if I run 1900x1200 and it doesn't change if I run 16bit depth or 24bit depth.

I have attached two screenshots, the first is vncing directly into qemu (which exhibits the problem) and the second is vncing to a vnc server I have running in the guest which doesn't have the problem.

I poked around in vnc.c and couldn't see any limits but I feel like its a buffer limit of some kind.

Also if you look very closely at the first image you can see that the first row is drawn correctly all the way across but subsequent rows are not.

If you need more information doesn't hesitate to ask.

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>Comment By: Avi Kivity (avik)
Date: 2010-01-10 18:26

Message:
Confirmed with vncviewer and vinagre, so unlikely to be a client problem.

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Comment By: Avi Kivity (avik)
Date: 2010-01-10 16:17

Message:
The cropping is 512 pixels wide, the correct area is 2048 pixels wide, so
it does look like some kind of limit.

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Comment By: SourceForge Robot (sf-robot)
Date: 2009-12-28 04:20

Message:
This Tracker item was closed automatically by the system. It was
previously set to a Pending status, and the original submitter
did not respond within 14 days (the time period specified by
the administrator of this Tracker).

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Comment By: Matthew Colyer (mcsoccer)
Date: 2009-12-17 05:18

Message:
The blocks do not show up when run in SDL mode. So I believe the problem is
still somehow related to the VNC server.

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Comment By: Avi Kivity (avik)
Date: 2009-12-13 12:29

Message:
Does it work well with SDL?  Maybe the problem is not vnc related.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2907597&group_id=180599