[X2Go-Commits] [live-build-x2go] 20/26: improved code to fix blank screen happening with DisplayPort and some buggy TFTs (xset q reports "Monitor is on" even though it is pitch black)

git-admin at x2go.org git-admin at x2go.org
Wed Jan 24 18:31:49 CET 2018


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x2go pushed a commit to branch feature/openbox-stretch
in repository live-build-x2go.

commit 6456887315ce58a91b3feb6b1362aebc731639c6
Author: Stefan Baur (BAUR-ITCS) <kontakt at baur-itcs.de>
Date:   Mon Jan 15 06:09:01 2018 +0100

    improved code to fix blank screen happening with DisplayPort and some buggy TFTs (xset q reports "Monitor is on" even though it is pitch black)
---
 .../lib/live/config/2900-x2go-thinclientconfig        | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/config/includes.chroot/lib/live/config/2900-x2go-thinclientconfig b/config/includes.chroot/lib/live/config/2900-x2go-thinclientconfig
index 8b0da8e..dc04f15 100755
--- a/config/includes.chroot/lib/live/config/2900-x2go-thinclientconfig
+++ b/config/includes.chroot/lib/live/config/2900-x2go-thinclientconfig
@@ -102,9 +102,24 @@ openbox &
 echo -en "\n\$(date +'%F | %T | ')'\$0' spawned OpenBox." | tee -a /dev/tty8
 
 # code to fix blank screen happening with DisplayPort and some buggy TFTs (xset q reports "Monitor is on" even though it is pitch black)
+# it seems that a simple
+# xset dpms force standby ; xset dpms force on
+# isn't enough (doesn't always help),
+# so let's add some resiliency and logging
+
 if grep -q '\W*blankdpmsfix\W*' /proc/cmdline; then
-        xset dpms force standby
-        xset dpms force on
+        while xset q | grep -q "Monitor is On" ; do
+                while ! xset q | grep -q "Monitor is in Standby" ; do
+                        echo -en "\n\$(date +'%F | %T | ')'\$0' Attempting to force TFT into 'standby'." | tee -a /dev/tty8
+                        xset dpms force standby
+                        echo -en "\n\$(date +'%F | %T | ')'\$0' \$(xset q | grep "Monitor is")" | tee -a /dev/tty8
+                done
+        done
+        while ! xset q | grep -q "Monitor is On" ; do
+                echo -en "\n\$(date +'%F | %T | ')'\$0' Attempting to force TFT to 'on'." | tee -a /dev/tty8
+                xset dpms force on
+                echo -en "\n\$(date +'%F | %T | ')'\$0' \$(xset q | grep "Monitor is")" | tee -a /dev/tty8
+        done
 fi
 
 # set screen background to X2Go default blue on all detected screens

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