Dmitry, I installed current mainline (as of 3b06b1a744) on a z840 here, and lost the mouse. Bisecting down, it seems like "HID: usbhid: remove custom locking from usbhid_open/close" (e399396a6b0) is at fault, and if I revert that and 283a21da1239 I get a working system again. Userspace is Ubuntu 16.04. Looking at X and dmesg logs, the only delta I see is that in the _good_ case I have a couple of these in dmesg: usb 3-12: Device not responding to setup address. usb 3-12: Device not responding to setup address. 3-12 unrelated to keyboard/mouse though (it's a 4-port hub, likely internal to the PC), so seems like a red herring. So, not sure just what's the root cause here, but allowing concurrent opens seems to make for unhappiness. It's a pretty small patch and nothing in it seems wrong, besides the change in behavior on allowing concurrent opens (removal of the mutex). -Olof -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
