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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2018-06-24 12:19:21 -0500
committerSlávek Banko <slavek.banko@axis.cz>2018-06-24 19:41:57 +0200
commitbc08650da1a29f4178fa2f412b18474fbf6727fb (patch)
treed77f802b21f016d4fa347c5a3f4c6d754e0de1bb /kdesktop
parent24ee9f5775095a8535d9249ed3436e028ba0b750 (diff)
downloadtdebase-bc08650da1a29f4178fa2f412b18474fbf6727fb.tar.gz
tdebase-bc08650da1a29f4178fa2f412b18474fbf6727fb.zip
Fix kdesktop_lock screensaver stuttering on modern GPUs
(cherry picked from commit 4ec011cd55856f3825672431b15c0318022c6948)
Diffstat (limited to 'kdesktop')
-rw-r--r--kdesktop/lock/lockprocess.cc6
1 files changed, 5 insertions, 1 deletions
diff --git a/kdesktop/lock/lockprocess.cc b/kdesktop/lock/lockprocess.cc
index dbe0da500..b4120f120 100644
--- a/kdesktop/lock/lockprocess.cc
+++ b/kdesktop/lock/lockprocess.cc
@@ -868,7 +868,11 @@ void LockProcess::createSaverWindow()
info = glXGetVisualFromFBConfig(x11Display(), fbc[j]);
if( info ) {
if (argb_visual) {
- if (info->depth < 32) {
+ // Xorg can only use GPU compositing for ARGB32 8:8:8:8 visuals
+ // Ensure the selected visual is 8 bits per RGB
+ // Selecting a non-8-bit visual will result in stuttering and high
+ // CPU load, while Xorg tries to composite each frame on the CPU!
+ if ((info->depth < 32) || (info->bits_per_rgb != 8)) {
XFree( info );
info = NULL;
continue;