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Description of problem: In a laptop equipped with an amd carrizo cpu and an additional monitor (or tv) connected to the hdmi output, the additional screen is configured as an extension screen (not in clone mode) using xrandr or mate-display-properties or gnome control center, if then the laptop screen is switched off with xrandr (or mate-display…) the screen becomes blank but start flickering at a rate of around 1 flicker per second. The sound output is also affected when this happens, starts to experience retards and what seems buffering problems Version-Release number of selected component (if applicable): xorg-x11-drv-ati-7.6.0-0.4.20150729git5510cd6.fc23.x86_64 kernel-4.3.5-300.fc23.x86_64 mesa-dri-drivers-11.1.0-2.20151218.fc23.x86_64 xorg-x11-server-Xorg-1.18.0-2.fc23.x86_64 xorg-x11-server-utils-7.7-17.fc23.x86_64 How reproducible: always Steps to Reproduce: 1. Connect to the laptop and additional monitor through hdmi 2. Using some tool of the os (xrandr or mate-display-properties or gnome control center), extend the monitor to the additional screen 3. Switch off the laptop screen with the OS tool Actual results: Laptop screen flickering Sound output not working correctly Expected results: Laptop screen completely blank Sound keeps working Additional info: Problem reproduced in a HP Pavilion - 15-ab102ns laptop Machine is equipped with an amd a10-8700p (carrizo) cpu with integrated gpu and audio
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