[X2Go-Commits] [live-build-x2go] 33/47: 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) - second attempt

git-admin at x2go.org git-admin at x2go.org
Wed Jan 24 18:21:49 CET 2018


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x2go pushed a commit to branch feature/openbox-magic-pixel-workaround
in repository live-build-x2go.

commit 6d74aeb823b2e2980f7f38463930d67d77686e6a
Author: Stefan Baur (BAUR-ITCS) <kontakt at baur-itcs.de>
Date:   Tue Jan 16 02:49:52 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) - second attempt
---
 .../lib/live/config/2900-x2go-thinclientconfig       | 20 +++-----------------
 1 file changed, 3 insertions(+), 17 deletions(-)

diff --git a/config/includes.chroot/lib/live/config/2900-x2go-thinclientconfig b/config/includes.chroot/lib/live/config/2900-x2go-thinclientconfig
index aefc735..0fdaac5 100755
--- a/config/includes.chroot/lib/live/config/2900-x2go-thinclientconfig
+++ b/config/includes.chroot/lib/live/config/2900-x2go-thinclientconfig
@@ -97,24 +97,10 @@ 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
-        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
+	CURRENTRES=\$(xrandr | awk '$0 ~/\*/ { print \$1}') # determine current resolution
+	xrandr -s 640x480 # set low resolution to trigger TFT wakeup
+	xrandr -s \$CURRENTRES # restore original resolution
 fi
 
 # set screen background to X2Go default blue on all detected screens

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