[ltp] z60m w/ dead LCD after playing with xrandr

[Richard Neill]

km wrote:
> Hello,
> 
> Today I connected an external Philips 190B5 LCD screen to my z60m and played
> around with xorg and xrandr with clone and mergedfb at work. The internal
> screen is the 1680x1050 one.
> 
> When I suspended to swap and then resumed the laptop at home the
> internal LCD display was dead. The external VGA still works but Im not
> getting any activity at all on the internal LCD.

Just to check - have you tried restarting from a cold boot? You didn't 
actually say that you have.

> 
> No BIOS output, no output in vesa mode, no output in X.org. Radeontool
> is unable to light the backlight and changing BIOS settings doesnt produce
> any results. On top of that I think I've tried almost all variations and
> settings in xorg for both the radeon and the fglrx driver.
> 
>>From Xorg I can also conclude that the LCD no longers gives any DPMS/DDC
> data at all, ie "dead".
> 
> The only thing I've noticed is that it looks like the screen lights up
> in _some_ xorg modes, but I cant see anything, just a faint light and perhaps
> som weak horizontal lines. Other than that the screen is totally black, not
> even a flicker when booting.
> 
>>From what I've gathered on the interweb this could be due to the power
> inverter being broken but almost all reports I've seen of that indicates
> that the screen should at least flicker or give some kind of light or a very
> faint image.
> 

If the inverter is broken, then you should be able to see something if 
you look at the screen with a bright light.


> Its still on warranty, but is there anything I could check before sending it
> back to Lenovo with all the hassle that would involve?

Try resetting the BIOS to defaults, and then booting with knoppix. That 
will give you a double check. But I'm pretty sure you've got toasted 
hardware - and it's likely to be coincidental, rather than something you 
actually did.

> 
> Would it give anything to install Windows?

I'd be extremely surprised.

> 
> And could xrandr have been the cause of this?
> 

I don't see how. X modelines could, a long time ago, damage very old 
(1990 era) CRTs. But that's about it.


Best wishes,

Richard