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Computer monitor doesn't display when connected to my laptop!


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#1
ammar555

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Hi,

I have Aspire Acer 5750 laptop with Intel HD 3000 graphics and Mac OS X 10.7.4 installed on it. My problem is that I can't adjust brightness, the brightness is too high that my eyes start hurting after 5 mintues of use. I could not find a DSDT patch or a kexts file to fix this issue. Since I have an extra computer monitor, I would like to connect it to my laptop and from there maybe I can adjust the brightness. For some reason when I do that, my monitor displays nothing, just black screen.

The only time I could see something is durning the installation process and the booting up process. Right now if I plugin my monitor to my laptop, nothing appears, but if I plug it in to my laptop when it is booting up, I can only see up to the user login screen section. As soon as the user screen shows up, my monitor goes black.

I hope someone can help here. It's really frustrating to use the laptop when the brightness is set to the highest level, too much for my eyes.

Thank you!

#2
giofrida

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Et Voila! DSDT Patch for Acer Aspire 5750 (hope it works!)

#3
TheRacerMaster

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To use the patch giogrida linked to, follow this guide by MacBreaker: http://www.macbreake...sdt-editor.html

#4
ammar555

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It looks like it worked, but there is a slight problem with the brightness level. You see when I move the slider to the left, the brightness decreases to about 50% only when it should go down slowly to 0%.

The brightness level is about 50% before the very last step level, if I move it one more step to the left, the screen goes black.

Posted Image

I attached my DSDT file just in case you need it. Thanks!


Attached File  DSDT.aml.zip   17.62KB   1 downloads

#5
ammar555

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Et Voila! DSDT Patch for Acer Aspire 5750 (hope it works!)


Do you have anything else I should try?

#6
giofrida

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I don't know what you can do but.. try to search other topics where some users have your issue

#7
TheRacerMaster

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Try this: http://www.insanelym...pic=236835&st=0

#8
giofrida

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Try this: http://www.insanelym...pic=236835&st=0


Right! The DSDT contains that blocks of codes. So should work!

#9
ammar555

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I found a temporarily fix to the brightness issue. I don't call it a solution, but its just a trick to get the brightness under control for now. I am not an expert with DSDT editing or else I would have tried adding some codes as suggested in the website you provided, I just chose this easy way.

I just deleted my DSDT file from my Extra folder, then I rebooted the laptop. While it was rebooting I decreased the brightness to the level desired with FN + Left/Right arrows. Since I deleted the DSDT file, the brightness level remained the same, before with the DSDT file, it would change itself.

Anyway, I am not happy about this solution, but since I tried to fix it for more than half a month and I failed, I would rather move on. If you ever find a solution even after a year, know that I am waiting for a real fix.

Thanks a lot to both of you!





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