Re: hid-logitech-hidpp / hid-logitech-dj driver hiding inputs and breaking Logitech G700s buttons

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Hi Filipe,

I'm on the latest 5.4.3 from kernel from kernel.org git repository. Only
a few security options are tweaked in the kconfig.
For your information, I am also facing the same issue on untouched Ubuntu
built kernels,

I never followed linux-input before and don't know how active was the code taking care of the G700s, but do you think there might have been a regression
since you say that it was a fixed issue?

Unfortunately, I didn't keep track on when it happened, ie after a kernel upgrade or if it was always there and I only noticed after trying the mouse
wirelessly.

Thanks,
Hamza ATTAK.


On Mon, 16 Dec, 2019 at 12:49 AM, Filipe Laíns <lains@xxxxxxxxxxxxx> wrote:
On Sun, 2019-12-15 at 19:34 +0000, Hamza Attak wrote:
 Hi,

 I have been facing an issue with my Logitech G700s mouse on wireless
 (id of
 the receiver is 046d:c531).
 Most of the buttons are not working, namely:
  G6, G7, G8, G9, G10

 My testing has shown that when pressing these buttons, no input at
 all
 is
 showing on both interfaces:
  /dev/input/by-id/usb-Logitech_USB_Receiver-if01-event-mouse
  /dev/input/by-id/usb-Logitech_USB_Receiver-if01-mouse

 Further testing shown that having 'hid_logitech_dj' or
 'hid_logitech_hidpp'
 module loaded is causing the issue, just one of them loaded is
 enough
 to create
 the issue. This led me to contact you by looking at
 'drivers/hid/hid-logitech-dj.c' and 'drivers/hid/hid-logitech-
 hidpp.c').
 rmmod'ing the modules and using 'usbhid' module alone is solving the
 issue, as
 Linux is now receiving correct input from the buttons.

 Blacklisting the modules would do the trick for wireless on my local
 system, but
 it doesn't seem right no to report this bug for others.

 For info, it works perfectly wired, so I guess the issue might be
 with
 the dj
 receiver code.

 Before thinking of modifying the code myself, I am sending you this
 message and
 see what would be a clean fix for the issue.

 Thanks,
 Hamza ATTAK.


Hello Hamza,

Which kernel version are you using? I am pretty sure this is an issue
that was fixed in newer versions.

Thank you,
Filipe Laíns




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