Hi, guys! I've tried to use both methods (acpi_call and byo-switcheroo) on my laptop with Ubuntu 11.10, but when I call
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch command in terminal I get this error: bash: /sys/kernel/debug/vgaswitcheroo/switch: Permission denied What is the problem? Why the command doesn't work?
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