Same flickering effect for me on groovy.  I don't know which packages
got updates back then. As for now, I run 5.8.0-50 and don't have older
kernels.  The videocard is this:

00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor 
Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])
        DeviceName:  Onboard IGD
        Subsystem: Dell 4th Gen Core Processor Integrated Graphics Controller
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 39
        Region 0: Memory at f5800000 (64-bit, non-prefetchable) [size=4M]
        Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at f000 [size=64]
        Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
        Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
                Address: fee00018  Data: 0000
        Capabilities: [d0] Power Management version 2
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [a4] PCI Advanced Features
                AFCap: TP+ FLR+
                AFCtrl: FLR-
                AFStatus: TP-
        Kernel driver in use: i915
        Kernel modules: i915

I run xorg+gdm3.  I don't know why wayland fails to start.

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https://bugs.launchpad.net/bugs/1926110

Title:
  Apps interface flickering

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