KDE Plasma 5.10.3 Fixes Longstanding NVIDIA VT/Suspend Issue
Written by Michael Larabel in KDE on 28 June 2017 at 07:11 AM EDT. 15 Comments
KDE --
KDE Plasma 5.10.3 has been released as the newest bug-fix update to Plasma 5. For NVIDIA Linux users in particular this upgrade should be worthwhile.

Plasma 5.10.3 has fixed a NVIDIA suspend issue that dates back to at least 2015, "Often after I suspend my machine, wait some time and resume back, I see sometimes black, other times corrupted screen with blinking triangles of distorted windows content. This happens on at least two machines I'm working on, both with nvidia video cards."

The problem originated with a change in KWin while the workaround was adding support for the GLX_NV_robustness_video_memory_purge extension. NV_robustness_video_memory_purge allows for applications to be notified when video memory has been purged.

Besides suspend/resume events, VT switches could sometimes cause the video memory to be evicted, which would also trigger this KDE bug. While this is acknowledged as a limitation of the NVIDIA OpenGL driver, the OpenGL specification doesn't specify where the video memory is allowed to be cleared, thus the need for this extension. But NVIDIA does plan to modify their OpenGL driver to allow for more persistent video memory.

Besides KDE Plasma 5.10.3 fixing VBOs/FBOs needing remapping in this case, this bug fix release also has other KWin fixes, support for shadows on windows 100% width or height, a new KDE_NO_GLOBAL_MENU environment variable, and other fixes.

More details on Plasma 5.10.3 at KDE.org.
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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 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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