Flickering Screen with Intel Graphics

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notasurgeon
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Flickering Screen with Intel Graphics

Post#1 by notasurgeon » 12 May 2015, 17:19

Hi!

I'm trying to boot on an HP Pro 3420, and it seems to work fine except that the screen is extremely flickery. It only stops if I boot into text only mode with the 'nomodeset' cheatcode. Any ideas? I'm assuming its a driver issue, so is this fixable?

xrandr output:
Screen 0: minimum 320 x 200, current 1600 x 900, maximum 32767 x 32767
eDP1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 440mm x 250mm
1600x900 58.0*+
1360x768 61.5
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)

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fanthom
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Re: Flickering Screen with Intel Graphics

Post#2 by fanthom » 12 May 2015, 18:33

hello notasurgeon,

please boot to GUI -> run psinfo command -> upload generated system report to pastebin.com and link here

thank you
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Re: Flickering Screen with Intel Graphics

Post#3 by notasurgeon » 13 May 2015, 18:46


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fanthom
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Re: Flickering Screen with Intel Graphics

Post#4 by fanthom » 14 May 2015, 08:48

thsi is a SandyBridge GPU which should be well supported by our kernel so it could be a hardware fault. please boot Ubuntu and confirm that flickering is not present there.

your monitor runs at maximum resolution but refresh rate is bit unusual:

Code: Select all

1600x900       58.0*+
please try to lower resolution to:

Code: Select all

1360x768       61.5
and check if that helps.
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notasurgeon
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Re: Flickering Screen with Intel Graphics

Post#5 by notasurgeon » 14 May 2015, 13:58

There are a bunch of these computers, I tried it on several and got the exact same results on each. It works fine on other computers of a different model. Other resolutions/refresh rates don't help.

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fanthom
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Re: Flickering Screen with Intel Graphics

Post#6 by fanthom » 14 May 2015, 14:19

please boot Ubuntu and check if it does any better. if not then i see no hope im afraid ...
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