lightum
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poliva
Keyboard and mouse are laggy when external displays are connected
I've installed lightum a few days ago from the latest develop commit. It worked fine until I connected external monitors. Mouse freezes shortly every half a second or so. Same with keyboard when typing. When I kill the lightum process it's back to normal again. When I disconnect external monitors it's back to normal again.
I'm using Ubuntu 14.04 LTS with default configuration on MBP11.1.
From my understanding of the code, the application is not meant to work with multi-monitor displays. Is this how you have your system set up?
I use it as my workstation during working hours during which I connect two external monitors. So half of the time I have 2 external monitors (lid closed), and the other half of the time lid open with no external monitors. I don't think this is a very exotic setup.
I'm not saying that it is an exotic setup but in reading the software it wasn't made to use multiple displays and as a result might not be dealing well with your specific setup.
For example, get_light_sensor_value() in functions.c reads from /sys/devices/platform/applesmc.768/light and get_screen_backlight_value() reads from /sys/class/backlight/acpi_video0.
These function are tied to the built-in display only. There are going to be problems with attempting to dim all of the other monitors. Please correct if I am wrong.
That's right. I'm also not expecting it to control external monitors. I expect it only control the built-in display. But when built-in display is turned off it shouldn't cause problems. Also it should ignore external displays without causing problems.
We'll need to debug the code to figure out where the problem lies. Given that I don't have external monitors to attach to my laptop, I'll need time to figure it out. Any help will be appreciated.