I can confirm behavior on my Xubuntu 20.04 x86_64 package. Suspend mode
is "assigned" to power button. Not until round about 30 seconds after
pressing the button, the PC goes into suspend mode.

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  Lid switch triggered suspend takes much longer than UI triggered

Status in linux package in Ubuntu:
Status in systemd package in Ubuntu:

Bug description:
  IBM T460
  5.0.0-13-generic #14-Ubuntu SMP Mon Apr 15 14:59:14 UTC 2019 x86_64 x86_64 
x86_64 GNU/Linux

  When triggering a suspend even from the lid switch of my Lenovo T460 it takes 
30 seconds to reach suspend state. Several others with different models of 
Lenovo laptops have also reproduced this issue. 

  It seems this is isolated to the lid switch as UI triggered suspend
  (alt+power icon) is far faster.

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