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Jul 09, 2014 Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. VNC will only let you switch to the maximum resolution supported by your actual console video driver. If this is limited to 640x480, you may be using the system default VGA driver (such as when running in safe mode). You can check this in Device Manager.

Pctel modem driver. This current version of Intel Graphics driver on ProLiant m710 Server does not work properly with RealVNC server. After entering Ctrl-Alt-Del from the VNC client, the screen stays black and does not let you enter your credentials. May 18, 2009 The problem may be confined to RealVNC only, or at least any VNC program that uses a special mirror driver. You can tell whether your VNC server uses a mirror driver by looking at your Settings-Desktop options under 'Optimise screen capture (mirror driver)': The Solution.

Mar 25, 2020 Updating your driver remotely. We recommend you use a VNC connection to upgrade your drivers. Changing the driver often changes the parts the driver the remote access tools are using, so you often lose the connection. VNC doesn’t connect into the driver at a low level, so keeps working as the old driver is changed out to the new.

How To Fix Redrawing Problems In Your VNC

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Posted by Artem Russakovskii on May 18th, 2009 in Stuff
Table Of Contents

The Problem

If you use VNC to remotely connect to your machines and are having problems with certain applications not showing changes (redrawing), this will, hopefully, solve the problem for you.

The symptoms are simple: you load a program but only the program outline and maybe the first frame would show up. After that, nothing would update, even though the user in front of the remote computer can see everything updating fine. For me, it is happening with all Java based programs (SmartSVN, Charles – amazing program btw!, etc). Here's what's happening to my Charles application – it never even sent the first frame, simply showing the desktop and not updating:

The problem may be confined to RealVNC only, or at least any VNC program that uses a special mirror driver. You can tell whether your VNC server uses a mirror driver by looking at your Settings->Desktop options under 'Optimise screen capture (mirror driver)':

The Solution

I'm not sure if it's Java's fault or the mirror driver's but, as it turns out, the mirror driver does not properly work with Java based programs, at least at the moment. Disabling it, or switching to application hooking fixes the problem. There is most likely a benefit in using a mirror driver as it is probably optimized better than other methods, but it's not worth keeping if you are having problems with it.

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The easiest way to disable the setting is to uncheck the checkbox above. You can also alternatively go to Expert options, find the UpdateMethod variable, and switch it to 0 or 1. I am fairly confident the setting of 1 is less resource intensive than 0, so I went with it.

My Java programs are fixed and redrawing fine now.

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Artem Russakovskii is a San Francisco programmer and blogger. Follow Artem on Twitter (@ArtemR) or subscribe to the RSS feed.

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