[SOLVED] Keyboard and mouse doesn't work in LFS 11.2

Lennie · 09-21-2022, 10:48 AM

I have updated my system from LFS 11.1 to 11.2, and now keyboard and mouse doesn't work after starting X. Keyboard works in console. I had the same problem in 11.1 when I tried libevdev 1.13.0 and then I solved it by recompiling it with libevdev 1.12.0.
I tried updating xorg-server and libevdev in LFS 11.1 and recompiling the other xorg drivers, and get the same problem. I also tried to update only xorg-server, and recompile the old version of the other drivers, and still got the same problem.
So something must have changed, both in libevdev and xorg-server?

I'm stuck...

The most interesting part from Xorg.log:

Code:

21.631] (II) Module evdev: vendor="X.Org Foundation"
[    21.631]     compiled for 1.21.1.4, module version = 2.10.6
[    21.631]     Module class: X.Org XInput Driver
[    21.631]     ABI class: X.Org XInput driver, version 24.4
[    21.631] (II) Using input driver 'evdev' for 'Power Button'
[    21.631] (**) Power Button: always reports core events
[    21.631] (**) evdev: Power Button: Device: "/dev/input/event1"
[    21.631] (EE) evdev: Power Button: Unable to open evdev device "/dev/input/event1" (Permission denied).
[    21.631] (EE) PreInit returned 2 for "Power Button"
[    21.631] (II) UnloadModule: "evdev"

I don't get permission denied in LFS 11.1.
I've googled, and the only thing I could find was from 2010, to add the user to the group input. I really dont think that's the right thing to do now...

Emerson · 09-21-2022, 04:12 PM

Why evdev? It was yesterday, today we use libinput. Perhaps they dropped support for libevdev. Legacy drivers still should work for keyboard and mouse.

Lennie · 09-22-2022, 11:05 AM

I tried input, but get the same "permission denied".

Code:

317.979] (II) config/udev: Adding input device Power Button (/dev/input/event1)
[   317.979] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[   317.979] (**) Power Button: Applying InputClass "XKB Defaults"
[   317.979] (II) LoadModule: "libinput"
[   317.979] (II) Loading /usr/lib/xorg/modules/input/libinput_drv.so
[   317.981] (II) Module libinput: vendor="X.Org Foundation"
[   317.981] 	compiled for 1.21.1.4, module version = 1.2.1
[   317.981] 	Module class: X.Org XInput Driver
[   317.981] 	ABI class: X.Org XInput driver, version 24.4
[   317.981] (II) Using input driver 'libinput' for 'Power Button'
[   317.981] (**) Power Button: always reports core events
[   317.981] (**) Option "Device" "/dev/input/event1"
[   317.988] (EE) xf86OpenSerial: Cannot open device /dev/input/event1
	Permission denied.
[   317.988] (II) event1: opening input device '/dev/input/event1' failed (Permission denied).
[   317.988] (II) event1  - failed to create input device '/dev/input/event1'.
[   317.988] (EE) libinput: Power Button: Failed to create a device for /dev/input/event1
[   317.988] (EE) PreInit returned 2 for "Power Button"
[   317.988] (II) UnloadModule: "libinput"

I get the same permission denied for all input devices.

Emerson · 09-22-2022, 11:10 AM

Who owns these input nodes? Add your user to this group.

Edit: just did 'ls -l' on mine, the group is surprisingly called 'input'.

Lennie · 09-22-2022, 12:21 PM

I did, and it worked... But I wonder if this really is the right solution. It feels so 2010... Isn't it a security risk? I didn't need to be in group input in 11.1, so I find it strange that I need it in 11.2. Or have they made polkit required as the only alternative to be in group input for this version of xorg? I don't want polkit.

Emerson · 09-22-2022, 12:39 PM

These are input devices and you did have the rights to use them before. Therefore I do not see how it could be an increased security risk. 2010? UNIX security is much older than that. I don't think fancy layers between user and kernel are necessarily security improvements.

Lennie · 09-22-2022, 12:53 PM

Ok, thanks.