Show HN: Multi-monitor KVM using just a USB switch

Re:Show HN: Multi-monitor KVM using just a USB switch by wtallis on Sunday February 11, 2024 @11:43PM (#39341426)

If you can't control the brightness from Linux when using proper software tools, then it's likely your monitor simply doesn't support the brightness control commands and inserting another device between your GPU and monitor won't achieve anything.

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Re:Show HN: Multi-monitor KVM using just a USB switch by lloeki on Monday February 12, 2024 @04:51AM (#39343177)

> your monitor simply doesn't support the brightness control commands

Or it does but the state of DDC/CI (and HDMI-CEC) is very sad as implementation is inconsistent and subpar to say the least (from order of commands to timing to subtle difference in required payloads that would make the display reject commands).

A dedicated device would cut the GPU out of the equation, but most likely patching ddc tools can be equally fruitful.

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Re:Show HN: Multi-monitor KVM using just a USB switch by Aardwolf on Monday February 12, 2024 @08:27AM (#39344487)

I have an Aten KVM switch in-between, maybe that one is doing something wrong, but it's a good KVM switch otherwise imho

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