Re:USB3: Why it's a bit harder than USB2
by vlovich123 on Wednesday October 07, 2020 @12:10PM
(#24709629)
I didn't say USB3 doesn't cause this interference. I was saying I don't recall this being a uniquely USB3 problem (unfortunately all I have is my memory to go on here that we had desense issues with USB+2.4Ghz when I worked on the Palm Pre & Jawbone Jambox).
Given the report is 8 years old, I find it hard to believe this isn't an active thing that's designed around. Hell, you can buy USB3 WiFi dongles that do 2.4 Ghz. If this were a critical flaw that's unsolvable such a device wouldn't be possible to build. Even Table 4-2 indicates different mouse models have different performance characteristics, indicating not all 2.4Ghz devices are similarly sensitive to the problem.
Re:USB3: Why it's a bit harder than USB2
by panda88888 on Wednesday October 07, 2020 @02:51PM
(#24711348)
My Lenovo 2.4 GHz mouse and MS Sculpt keyboard suffered from interference when the receiver dongle is plugged directly into a USB 3 hub with other USB 3 devices, and this is a well known issue. I fixed it by buying a shielded usb cable to move the receiver away from the interfering USB 3 hub and closer to the keyboard/mouse themselves.
https://usb.org/sites/default/files/327216.pdf
Paper by Intel about USB 3.0 interfering with 2.4 GHz WiFi. The fact that the USB-IF hosts this paper on their own site seems to be a strong endorsement of their conclusions too.
It is worth noting that the RF noise generated by USB 3.0 covers a fairly wide spectrum from basically zero up to the mid-4 GHz range, but it gets discussed mostly in the context of interference with 2.4 GHz because most USB 3.0 capable devices don't have any other radios in that range to interfere with.