The screen sort of flickers rightwards, and the stuff on the right edge starts appearing on the left edge. Immediately resolves when I move my mouse. Happens every five-ten minutes.
GPU info from lshw:
*-display description: VGA compatible controller product: Skylake GT2 [HD Graphics 520] [8086:1916] vendor: Intel Corporation [8086] physical id: 2 bus info: pci@0000:00:02.0 version: 07 width: 64 bits clock: 33MHz capabilities: pciexpress msi pm vga_controller bus_master cap_list configuration: driver=i915 latency=0 resources: irq:127 memory:b0000000-b0ffffff memory:a0000000-afffffff ioport:6000(size=64) memory:c0000-dffff *-display description: Display controller product: Sun XT [Radeon HD 8670A/8670M/8690M / R5 M330 / M430 / Radeon 520 Mobile] [1002:6660] vendor: Advanced Micro Devices, Inc. [AMD/ATI] [1002] physical id: 0 bus info: pci@0000:01:00.0 version: 83 width: 64 bits clock: 33MHz capabilities: pm pciexpress msi bus_master cap_list rom configuration: driver=amdgpu latency=0 resources: irq:128 memory:90000000-9fffffff memory:b1300000-b133ffff ioport:5000(size=256) memory:b1340000-b135ffff