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Wayland Support For Pinging, Fading Clients

Wayland

Published on 16 April 2012 01:44 PM EDT
Written by Michael Larabel in Wayland
8 Comments

Patches were published today that introduce pinging support for Wayland clients, in an attempt to determine if a client is dead or alive. Should a client not respond to the ping request, the Wayland client's surface is faded-out.

Hitting the Wayland mailing list were a set of patches by Scott Moreau that introduce a ping event for Wayland as well as support for setting the brightness and saturation for the surface shader.

The basic premise is that the Wayland compositor can ping clients and if the client doesn't respond to that ping request with a pong, to the point that a time-out is reached, that application is likely hung. If a Wayland client is determined to be hung, the surface (interface) can faded via adjusting the saturation and brightness to indicate the hang to the end-user. If the client later begins to respond, the action can be undone.

This has long been a Wayland TODO action item. A simple set of three patches provided this support. There hasn't been any developer comments on the patch-set so far, but it's fairly straightforward.

Meanwhile, there's still a lot of other activities going on with Wayland as summarized earlier this month.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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