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Thread: Thinkpad display blank

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i have thinkpad t42. has been working fine (both ubuntu jaunty jackalope , windows xp). nothing on screen - not bios splash screen.

happened after got hung in non-privileged user. had tried use 2 monitors (the built in, , hdtv (vga interface). after trying set independent monitors (unchecking "mirror screens"), stuff runs across top disappeared. there nothing left on screen except orange background. couldn't - not log off. left click on screen brought menu included shutdown, hibernate, suspend (but not logoff). wouldn't let me shutdown (not enough privilege).

powered down pushing , holding power button. (at least think powered down - lights went off except 1 shows connected ac - , cresent moon shows suspend state off.)

when power on, thinkpad's screen stays totally blank. don't bios splash screen. disk activity, never on screen.

attaching hdtv doesn't help. tried monitor on dvi interface (on docking station). nothing displayed on screen.

ideas? there "default monitor" bios setting ubuntu might have changed. if so, how can change given never on laptop screen - or other monitor?

(i tried removing battery , letting sit couple of hours - didn't help.)

rich

quote posted bigirontx view post
i have thinkpad t42. has been working fine (both ubuntu jaunty jackalope , windows xp). nothing on screen - not bios splash screen.

happened after got hung in non-privileged user. had tried use 2 monitors (the built in, , hdtv (vga interface). after trying set independent monitors (unchecking "mirror screens"), stuff runs across top disappeared. there nothing left on screen except orange background. couldn't - not log off. left click on screen brought menu included shutdown, hibernate, suspend (but not logoff). wouldn't let me shutdown (not enough privilege).

powered down pushing , holding power button. (at least think powered down - lights went off except 1 shows connected ac - , cresent moon shows suspend state off.)

when power on, thinkpad's screen stays totally blank. don't bios splash screen. disk activity, never on screen.

attaching hdtv doesn't help. tried monitor on dvi interface (on docking station). nothing displayed on screen.

ideas? there "default monitor" bios setting ubuntu might have changed. if so, how can change given never on laptop screen - or other monitor?

(i tried removing battery , letting sit couple of hours - didn't help.)

rich
this resolved. in addition removing main battery and, of course, unplugging computer, had remove "backup battery", i.e., little coin sized battery keeps cmos/bios memory when there no power. apparently reset bios factory defaults. once done, , put together, got bios splash screen when powered on , able bios , set reasonable settings. booted ok.

leads me believe ubuntu messes bios settings (at least bios display settings when running multiple monitors) , powering off machine without kept ubuntu restore settings.

comments? know if ubuntu changes bios settings?

rich


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