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

[Carl Friedberg]

Perhaps these links gleaned from Google could be of some help; if so
please let us know...

http://acpi.sourceforge.net/documentation/howto.html

http://acpi.sourceforge.net/documentation/howto.html

>From the howto, more references:

If you would like more information on power management
 in laptops, check out the resources on tuxmobil.org.

http://www.tuxmobil.org/

Specifically: Power Management with Linux - APM, ACPI,
PMU
http://tuxmobil.org/apm_linux.html and
 the Hardware in Detail section

http://tuxmobil.org/Mobile-Guide.db/mobile-guide-p2c1-hardware-in-detail.html

of the Linux Mobile Guide.
http://tuxmobil.org/Mobile-Guide.db/Mobile-Guide.html



Carl

> -----Original Message-----
> From: Mark G. Spencer [mailto:mspencer%evidentdata.com@fwd.com]
> Sent: Monday, September 22, 2003 5:42 PM
> To: linux-thinkpad
> Subject: [ltp] Thinkpad T40 screen goes dead under Red Hat 9 ..
> 
> 
> 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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