Messages in this thread | | | From | Olof Johansson <> | Date | Wed, 12 Jul 2017 14:45:18 -0700 | Subject | Regression during 4.13 merge window: Mouse not working (under X) |
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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
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