I too have the same problem. A lag when starting a program, thunderbird, firefox, libreoffice. It affects all my machines, my Thinkpad A275 and my Hp 840 G4.
mhwd -l -d
PCI Device: /devices/pci0000:00/0000:00:02.0 (0300:8086:5916)
Display controller Intel Corporation HD Graphics 620
--------------------------------------------------------------------------------
> INSTALLED:
NAME: video-linux
ATTACHED: PCI
VERSION: 2018.05.04
INFO: Standard open source drivers.
PRIORITY: 2
FREEDRIVER: true
DEPENDS: -
CONFLICTS: -
CLASSIDS: 0300 0380 0302
VENDORIDS: 1002 8086 10de
> AVAILABLE:
NAME: video-linux
ATTACHED: PCI
VERSION: 2018.05.04
INFO: Standard open source drivers.
PRIORITY: 2
FREEDRIVER: true
DEPENDS: -
CONFLICTS: -
CLASSIDS: 0300 0380 0302
VENDORIDS: 1002 8086 10de
NAME: video-modesetting
ATTACHED: PCI
VERSION: 2020.01.13
INFO: X.org modesetting video driver.
PRIORITY: 1
FREEDRIVER: true
DEPENDS: -
CONFLICTS: -
CLASSIDS: 0300
VENDORIDS: *
NAME: video-vesa
ATTACHED: PCI
VERSION: 2017.03.12
INFO: X.org vesa video driver.
PRIORITY: 0
FREEDRIVER: true
DEPENDS: -
CONFLICTS: -
CLASSIDS: 0300
VENDORIDS: *
Warning: no configs for USB devices found!