The default is for ALR to affect only PutImage operations, which is what VGL 
uses to draw images. Many 2D apps use other methods to draw images, like X 
Render or CopyArea, that won't be subject to ALR unless you set TVNC_ALRALL. 
The docs go into more detail. ALR is really targeted at 3D apps.

> On Oct 4, 2013, at 10:11 AM, Kevin Van Workum <v...@sabalcore.com> wrote:
> 
> There was no blinking cursor. Setting TVNC_ALRALL=1 makes the refresh
> work. So maybe it's not a bug.
> 
>> On Fri, Oct 4, 2013 at 10:41 AM, Kevin Van Workum <v...@sabalcore.com> wrote:
>> I'm having trouble with the -alr option to Xvnc. I start the server with:
>> 
>> $  /opt/TurboVNC/bin/vncserver -alr 5
>> 
>> Then connect with:
>> 
>> /opt/TurboVNC/bin/vncviewer -Subsampling=gray -Quality=10 host:6
>> 
>> When my desktop appears, it is using the specified Subsampling and
>> Quality. Then, without interacting with the desktop, within 5 seconds
>> I get a lossless refresh as expected. But if I then interact with the
>> desktop a bit, I do not get a refresh after 5 seconds of inactivity.
>> 
>> Kevin
>> 
>> --
>> Kevin Van Workum, PhD
>> Sabalcore Computing Inc.
>> "Where Data Becomes Discovery"
>> http://www.sabalcore.com
>> 877-492-8027 ext. 11
> 
> 
> 
> -- 
> Kevin Van Workum, PhD
> Sabalcore Computing Inc.
> "Where Data Becomes Discovery"
> http://www.sabalcore.com
> 877-492-8027 ext. 11
> 
> -- 
> 
> 
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