[ltp] Thinkpad T40 screen goes dead under Red Hat 9 ..

[Peter Theunis]

Hi,

Is the system loading the "radeonfb" module ?
if so, disable it and use the vesafb module instead; the radeon framebuffer is known to break suspend.

Hope this helps,

p
Mark G. Spencer [mspencer@evidentdata.com] wrote:
> My company recently purchased three new Thinkpad T40's with the ATI Radeon
> 9000 video chipset.  I got lucky enough to score one.
> 
> A very aggravating problem has been found when running Red Hat Linux 9 on
> these notebook computers.  The screens go into some kind of power saving
> that we can never get them out of.  When running on battery it only takes
> what seems like a few minutes of inactivity.  When running on AC power, it
> takes longer to happen, but eventually the screens go dark.  As far as I can
> tell, the hard drive and cpu are still operating, but the screen just goes
> dark.
> 
> The screensaver power management functions are not enabled in Red Hat for
> these machines, the default setting.  This behavior does not occur on these
> Thinkpad T40 notebooks when running Windows XP Professional, and we do not
> get this problem on any of our other make notebooks (Sony, Fujitsu, etc.)
> when running Red Hat Linux 9.
> 
> I'm hoping I do not have to kill all power saving features in the BIOS and
> can instead come to some kind of solution within Red Hat 9 to keep these
> machines from going into the terminal blank screen .. 
> 
> Thanks for the advice,
> 
> Mark
> 
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