Ocasional tela piscando após a atualização completa do sistema no Arch Linux / KDE Plasma 5

Question

Há alguns dias atualizei totalmente o sistema Arch e desde então alguns aplicativos começam a piscar de vez em quando, geralmente o Konsole e o Emacs.

O tremular suspeito aparentemente aparece aleatoriamente, mas quase sempre é resolvido quando a aplicação é encerrada (como dito, geralmente Emacs e Konsole).

Antes de começar a vasculhar os drivers, gostaria de perguntar:

Does anyone have any experience with such a flickering? It happens from time to time and it is usually solved when currently used application is shut down.

A mudança de motoristas não me ajudou muito no passado. Por norma, os condutores mais onipresentes mostraram-se como os melhores.

Eu tentei descobrir o que causou o comportamento, mas sem sucesso. Em favor de ter tudo o que é

Informação do sistema:

OS: Arch Linux 
Kernel: x86_64 Linux 4.9.65-1-lts
Uptime: 1h 40m
Resolution: 1920x1080
DE: KDE 5.40.0 / Plasma 5.11.3
WM: KWin
WM Theme: Breeze
GTK Theme: Breeze [GTK2/3]
Icon Theme: breeze
Font: Noto Sans Regular
CPU: Intel Core i5-5200U @ 4x 2.7GHz [37.0°C]
GPU: intel
RAM: 2195MiB / 7867MiB

Servidor Xorg:

[novak@thinkpad ~]$ pacman -Qi xorg-server | grep Version
Version         : 1.19.5-1

Driver gráfico:

[novak@thinkpad ~]$ lspci -nnk | grep -i vga -A3
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 5500 [8086:1616] (rev 09)
        Subsystem: Lenovo HD Graphics 5500 [17aa:2227]
        Kernel driver in use: i915
        Kernel modules: i915

Log do Xorg:

[novak@thinkpad ~]$ cat ~/.local/share/xorg/Xorg.0.log | grep EE
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[     5.642] (EE) Failed to load module "intel" (module does not exist, 0)
[     5.642] (EE) Failed to load module "fbdev" (module does not exist, 0)
[     5.642] (EE) Failed to load module "vesa" (module does not exist, 0)

O Systemd não relata nenhum serviço com falha:

novak@thinkpad ~]$ systemctl --failed
0 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

Jornal (contanto que eu saiba, nada está relacionado ao Xorg, tela ou driver):

[novak@thinkpad ~]$ journalctl -b | grep -i error
Nov 25 14:27:27 thinkpad kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
Nov 25 14:27:28 thinkpad kscreen_backend_launcher[630]: kscreen.xcb.helper: Event Error:  147
Nov 25 14:30:15 thinkpad baloo_file_extractor[1840]: "Error: May not be a PDF file (continuing anyway)"
Nov 25 14:30:15 thinkpad baloo_file_extractor[1840]: "Error: Couldn't find trailer dictionary"
Nov 25 14:30:15 thinkpad baloo_file_extractor[1840]: "Error: Couldn't find trailer dictionary"
Nov 25 14:30:15 thinkpad baloo_file_extractor[1840]: "Error: Couldn't read xref table"
Nov 25 15:32:49 thinkpad kcheckpass[3517]: pam_tally(kde:auth): Error opening /var/log/faillog for update
Nov 25 15:32:49 thinkpad kcheckpass[3517]: pam_tally(kde:auth): Error opening /var/log/faillog for read
Nov 25 15:32:49 thinkpad kcheckpass[3517]: pam_tally(kde:setcred): Error opening /var/log/faillog for update
Nov 25 15:32:49 thinkpad kcheckpass[3517]: pam_tally(kde:setcred): Error opening /var/log/faillog for update
Nov 25 16:03:00 thinkpad kcheckpass[3770]: pam_tally(kde:auth): Error opening /var/log/faillog for update
Nov 25 16:03:00 thinkpad kcheckpass[3770]: pam_tally(kde:auth): Error opening /var/log/faillog for read
Nov 25 16:03:06 thinkpad kcheckpass[3770]: pam_tally(kde:auth): Error opening /var/log/faillog for update
Nov 25 16:03:06 thinkpad kcheckpass[3770]: pam_tally(kde:auth): Error opening /var/log/faillog for read
Nov 25 16:03:06 thinkpad kcheckpass[3770]: pam_tally(kde:setcred): Error opening /var/log/faillog for update
Nov 25 16:03:06 thinkpad kcheckpass[3770]: pam_tally(kde:setcred): Error opening /var/log/faillog for update