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hyOffline
Post subject: Screen is (almost) completely dark when booting from live CD  PostPosted: 29.03.2011, 18:59



Joined: 2010-09-14
Posts: 164
Location: Costa Teguise
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Hi, I am having the latest live DVD and wanted to install aptosid to a new computer. After boot the screen is almost completely dark.
Only a slight shadow of a window (probably the aptosid help file that turns up automagically) is to be seen. And it changes to completely dark whenI press CTRL-ALT-F1 in order to get to the console.
Changing back via CTRL-ALT-F7 it's still dark, but again the window that is displayed is less than a mere shadow.

It's an ACER TravelMate 5735Z with INTEL Pentium T4500
The keys that usually should brighten or dim the screen don't work.
Any ideas?
 
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hyOffline
Post subject: RE: Screen is (almost) completely dark when booting from liv  PostPosted: 30.03.2011, 09:34



Joined: 2010-09-14
Posts: 164
Location: Costa Teguise
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Ok, when booting from the live CD the boot option
      Code:
i915.modeset=0

helped and everything went fine.
But after installing aptosid (and install downloaded some firmware) the problem appeared again.
I have already tried several cheat codes regarding display and ACPI but still the problem persists.
 
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dieresOffline
Post subject:   PostPosted: 30.03.2011, 10:20



Joined: 2010-09-12
Posts: 30

Status: Offline
I think you need to install firmware-linux-nonfree. If that doesn't
work you schould have a look at /etc/default/grub to have radeon.modeset=0 in it.
 
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devilOffline
Post subject:   PostPosted: 30.03.2011, 10:26



Joined: 2010-08-26
Posts: 491
Location: Berlin
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well, for an intel card the above is useless.

greetz
devil
 
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hyOffline
Post subject:   PostPosted: 30.03.2011, 10:34



Joined: 2010-09-14
Posts: 164
Location: Costa Teguise
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firmware-linux-nonfree is installed while installation in order to load firmware for tg3 driver which has nothing to do with the screen problem (if I am wrong please correct me).

I am reinstalling at the moment. Is there some output I should collect before restarting - in order to get a grip on the problem?
 
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hyOffline
Post subject:   PostPosted: 30.03.2011, 11:19



Joined: 2010-09-14
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Location: Costa Teguise
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The screen darkens on boot when it says:
      Code:
waiting for /dev to be fully populated


booting the Live-CD with
      Code:
i915.modeset=0
there is
      Code:
...done
appended to this output. But when booting from harddisk after installation it always turns dark at that point.
 
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hyOffline
Post subject:   PostPosted: 30.03.2011, 13:13



Joined: 2010-09-14
Posts: 164
Location: Costa Teguise
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solved
What I needed was:
      Code:
i915.modeset=0


Thanks to devil for this invaluable hint at first place.

But after installation this cheat code was not accepted somehow when I entered it into the command line of grub.

Thanks to absolut who helped me analyzing the Xorg.0.log after several reboots (I could ssh into the box and so analysis was possible). We finally found that whatever cheatcode I tried it was somehow not accepted.

So I edited the grub menue and entered the cheatcode directly there instead of editing from the boot prompt.

When I tried
      Code:
i915.modeset=0
there it worked.

Still the screen resolution is not set up correctly but that will be another thread after du.

Thanks to everyone for their efforts on IRC, trying to help me.
 
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hyOffline
Post subject:   PostPosted: 30.03.2011, 21:41



Joined: 2010-09-14
Posts: 164
Location: Costa Teguise
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Hi finally user absolut helped me to get rid of the cheatcodes and the solution was
      Code:
setpci -s 00:02.0 F4.B=22

Instead of 22 you may use other values below FF [FF is black and 00 is white].
Anyway I had to put it into script to be run every time when the machine is started. Additionally the script should be quickly available via a systemwide shortcut - just in case something turns the system back and dark
 
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