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[Frédéric Meynadier <794474@xxxxxxxxxxxxxxxxxx>]

I experience a similar problem : 1600x900 screen, intel video, ubuntu
11.04, dell e6420 received 2 days ago, started flickering after waking
up from a standby mode this afternoon.

Also a HW problem, as it happens also on the Win7 install that is
installed alongside. In fact it flickers as soon as it lights up, from
the earliest BIOS screen (several blinks per second). The external (DVI)
display is OK.

Unfortunately this  hasn't disappeared, so I had to call Dell support
and they plan to replace the whole laptop display.

Could anybody confirm there is no way to damage any screen with the "standard" settings (I did not play with xrandr, for example). I remember the times when hacking the modeline in XF86Config was considered hazardous, back in the CRT days....
This time I just had to re-enter the "displays" parameters several times before reaching a functionning state, in the gnome-ish GUI that comes with Unity.

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https://bugs.launchpad.net/bugs/794474

Title:
  latitude e6420 screen flickering (sandy bridge intel video card)

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