Re:Linux touchpad like a Macbook: progress and a call for help
by curt15 on Monday March 25, 2019 @02:52PM
(#19485532)
How much of PC laptops' touchpad quality is due to hardware limitations? I seem to recall back when I owned an Apple laptop (circa 2010) that its trackpad was connected internally via USB. Meanwhile, PC touchpads almost universally used PS/2 which provided far lower bandwidth. Is this still the case?
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Re:Linux touchpad like a Macbook: progress and a call for help
by ehntoo on Monday March 25, 2019 @02:56PM
(#19485587)
The Microsoft Precision Touchpad[1] devices are interfaced over I2C or USB. Bandwidth for I2C depends on implementation AFAIK, but should be plenty for a responsive touchpad.
[1] https://docs.microsoft.com/en-us/windows-hardware/design/com...
Re:Linux touchpad like a Macbook: progress and a call for help
by oneplane on Monday March 25, 2019 @02:54PM
(#19485560)
Yes and no. Some trackpads are connected over actual PS/2, but others via the EC and that one simulates PS/2 internally. On the MacBook side it's SPI now, not in all cases, but pretty often. Not sure if it's a Double or Quard SPI interface but apparently it still does the same nice experience they had with USB - and better.