Re:Desktop compositing latency is real
by StillBored on Tuesday November 21, 2017 @12:22PM
(#15749548)
Replace with _any_ keyboard manufacture.. Similarly, while your keyboard may advertise USB2 or even USB3, the actual key-press USB interface is always running at USB 1 low speed (1.5Mbit).
I spent a fair amount of time trying to find a keyboard to work on a device that I have that only works with high speed devices, 30 or 40 keyboards later I gave up... If someone actually knows of such a thing I would be interested. Same basic problem with mice.. I guess the thought-process is that hey USB2 supports split transactions, and the keyboard/mouse won't actually generate even 1.5M bit of data, so we are going to continue to sell the same basic mouse/keyboard interfaces we were selling 20 years ago wrapped in styling variations.
PS: Some of the physical button keyboards I found with configurable colors/etc, usb hubs, do support USB3... For the color controls, or hub. The keyboard endpoint is still at low speed...
Re:Desktop compositing latency is real
by falcolas on Tuesday November 21, 2017 @02:27PM
(#15750754)
Likely because they want to implement the minimum necessary HID spec (or, in a nicer tone, the HID spec with the most compatibility), which would be the one supported by the BIOS.
I spent a fair amount of time trying to find a keyboard to work on a device that I have that only works with high speed devices, 30 or 40 keyboards later I gave up... If someone actually knows of such a thing I would be interested. Same basic problem with mice.. I guess the thought-process is that hey USB2 supports split transactions, and the keyboard/mouse won't actually generate even 1.5M bit of data, so we are going to continue to sell the same basic mouse/keyboard interfaces we were selling 20 years ago wrapped in styling variations.
PS: Some of the physical button keyboards I found with configurable colors/etc, usb hubs, do support USB3... For the color controls, or hub. The keyboard endpoint is still at low speed...