![]() The first is the USB vendor ID, the second is the USB device ID. Note the ID has two four digit hexadecimal numbers separated by a colon. This line in bold is the main USB device that controls the Apple display. Audio in LED Cinema Displayīus 001 Device 007: ID 05ac:9126 Apple, Inc. iSight in LED Cinema Displayīus 001 Device 010: ID 05ac:1105 Apple, Inc. LED Cinema Displayīus 001 Device 011: ID 05ac:8508 Apple, Inc. We can either tell our Linux system to change the ownership of the device or have acdcontrol always run as root.įirst, run lsusb | grep "Apple" and you will see something like this: $ lsusb | grep Appleīus 001 Device 012: ID 05ac:9226 Apple, Inc. By default, this is only possible if you are root because the /dev/usb/hiddev* devices are owned by root and are only writeable by root. This tool needs to communicate with the USB Human Interface Device your monitor creates. You can clone the repository locally and built this simple tool from source: git clone Īfter a second or so the acdcontrol binary will have been built. Luckily there's a a third party, currently maintained fork of acdcontrol with support for many more monitors. Unfortunately, the original version has been unmaintained for over a decade and doesn't support my 27" Apple LED Cinema Display or anything newer than that. There's a handy tool called acdcontrol to do that. We need a way to control the brightness of the display. Step 1 - control the brightness from the command line Updated December 2020: Using a maintained fork of the acdcontrol tool, removing the need to run acdcontrol with root privileges and a much simpler Bash script for the integration with the desktop environment, documented how to modify acdcontrol to support other monitors. ![]() I finally found a solution to control the brightness using keyboard shortcuts. Being a geek I was anything but content with this situation. The only problem is that the Apple display comes with no physical controls for brightness and Ubuntu doesn't seem to be able to adjust it either. I am the happy owner of an Intel NUC dual booting Windows 8.1 and Ubuntu, hooked up to a great-looking Apple LED Cinema Display. ![]()
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