> A couple of days ago it starts up with a flurry, relatively dark screen with
> streaks. After about 10 minutes hooked by HDMI to a monitor for tv it
> becomes more distinct and brighter though not so much as before, streaks
> are gone. (I think it may be getting darker. The image on the tv is as
> bright and distinct as ever.)
Does the "dark screen with streaks" still show something useful?
Maybe a photo would help diagnose the problem.
If the "dark screen with streaks" does not show anything resembling the
windows&text you expect to see, then it reminds me of a thing I've seen
on some laptops when the driver fails to initialize the
display properly (i.e. a software problem). Does it happen right away
at boot, or only later on (say, when the DRM driver is loaded, or when
X11 or Wayland is launched)?
Stefan
