This happens on Ubuntu 16.04 with i3wm, the processor is a Haswell (i54210u) with a HD 4400, using Intel drivers.
None of the tweak tools work with i3wm, how do I solve this issue.
Related to this, How do I fix fonts not rendering and missing letters?. Except with different hardware.
I have a dedicated GPU, but it's switched off via the nvidia-settings app.
lshw -c video gives me
*-display
description: VGA compatible controller
product: Haswell-ULT Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 0b
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:46 memory:c3000000-c33fffff memory:d0000000-dfffffff ioport:5000(size=64) `
*-display
description: 3D controller
product: GF117M [GeForce 610M/710M/810M/820M / GT 620M/625M/630M/720M]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:03:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress cap_list
configuration: driver=nvidia latency=0
resources: irq:16 memory:c2000000-c2ffffff memory:b0000000-bfffffff memory:c0000000-c1ffffff ioport:3000(size=128)
sudo pm-suspend? – user.dz Oct 31 '16 at 06:09