DEBIAN: Screen synchronization issue on Dell Latitude 7480

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DEBIAN: Screen synchronization issue on Dell Latitude 7480

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09-06-2020, 11:18 AM	#1
ardabro Member Registered: May 2015 Location: Katowice, Poland Distribution: Debian, Ubuntu Posts: 39 Rep:	DEBIAN: Screen synchronization issue on Dell Latitude 7480 Hi I'm experiencing constant, heavy synchronization problems on Debian Buster (the same on Stretch) and various kernels between 4.19 and 5.7. This happens also on text console. Modifying refresh rate (48/60/120 Hz) doesn't help. I found solutions modifying driver options: i915.enable_psr=0 and i915.enable_rc6=0 - no luck. I also found solution based on modifications in /etc/X11/xorg.conf.d/20-intel.conf: Code: Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "sna"/"xxa"/"uxa" Option "TearFree" "true" EndSection Still no luck. The only working workaround is to reduce resolution from nominal 1920x1080 to 1680x1050 What else could be done to diagnose this problem and fix it? Attached Thumbnails

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