Hello,everyone. I have a bad issue with my laptop dell 7591 which is a quite new model .OSes are win10+debain10 .The problem is:
When system started, mouse ,keyboard and touchpad work as usual, but after lid closes & reopen,none of them works , even re-plugin a USB mouse or keyboard though the login screen appears but without the cursor blink , mouse touchpad keyboard become disabled EXCEPT fn+F5 can light up keyboard LED.

I searched the Internet for solution. Several posts tell me it has something to do with the boot cmdline ,need to add boot arguments.
ubuntuforums.org/archive/index.php/t-2224316.htm
lxle.net/forums/discussion/933/lxle-will-not-work-with-laptop-keyboardtrackpad
askubuntu.com/questions/916465/ubuntu-17-04-keyboard-not-responding-after-suspend


I'm not sure the problem with my machine is something mentioned in the 3 posts above, I tried several arguments added to my boot operation,but none works for my machine. Even I don't know its meaning and function.
such as:
i8042.nomux
i8042.reset
i8042.reset i8042.nomux
atkbd.reset i8042.nomux
i8042.noaux
i8042.nokbd
i8042.noloop
i8042.nopnp
i8042.unlock
i8042.direct
i8042.dumbkbd
i8042.reset i8042.nomux i8042.nopnp i8042.noloop
i8042.nopnp=1 i8042.dumbkbd=1
i8042.notimeout
i8042.kbdreset

I did not tried them all ,just some of them .No this problem in Win10!

This is my hardware infomation.
$ sudo dmesg|grep i8042
[ 2.008568] i8042: PNP: PS/2 Controller [PNP0303:PS2K] at 0x60,0x64 irq 1
[ 2.008569] i8042: PNP: PS/2 appears to have AUX port disabled, if this is incorrect please boot with i8042.nopnp
[ 2.009055] i8042: Warning: Keylock active
[ 2.009334] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 2.011481] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input0


So what's the true reason for the problem with my machine? and how to resolve it?

Any other information needed Please let me know. Thanks a lot!

Sometimes worth checking out if a BIOS uodate is available.

Just in case this is helpful as a workaround
http://erikimh.com/touchpad-stops-wo...6-on-dell-xps/

Thanks for your response. I have updated the BIOS to the latest version,but the problem is still there.
The post above doesn't solve my problem,because I lose control of all input devices after resume.
So once the machine was suspended,I had to restart it.

I can only suggest submitting a bug report then...
https://www.debian.org/Bugs/

This problem seems to pop up every now and then. It's tricky.
See through these search results please.

Hello everyone. This serious problem has been solved on my DELL 7591 laptop.

When I confirmed the Dell 7591 weather got a UBUNTU certificate, yeah, dell7591 got it. So I guessed the bug had been solved.
Then I downloaded the 18.04(with kernel 5.1 ) to test , yeah, the bug disappeared!

Then I update my Debian from version 10 to "testing"(with kernel 5.3.15) , no this bug appeared either!

If you encountered the same problem as mine, I suggesst you update your linux kernel to a later version above 5.1...