Indeed the playdeb repo still gives the 400 error, but when commented out the
problem does NOT persist, so in fact the apt issue IS resolved.
Now all we need is a working repo from playdeb!
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playdeb server unavailable causes apt to crash: Method gave invalid 400 URI
Failure message
Public bug reported:
Binary package hint: xserver-xorg-video-intel
On a 15.4 laptop with an intel graphics chip (Intel Corporation Mobile
GM965/GL960 Integrated Graphics Controller) I used to be able to play 3D
games such as Halo2, Fable2, SoF4 etc at low-to-medium GFX settings with
no problems.