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

[Mark G. Spencer]

Hi Peter,

Sorry to be a newbie Linux dork .. But .. How would I know if my system is
loading that module?

Thanks,

Mark

-----Original Message-----
From: linux-thinkpad-admin@linux-thinkpad.org
[mailto:linux-thinkpad-admin@linux-thinkpad.org] On Behalf Of Peter Theunis
Sent: Monday, September 22, 2003 3:51 PM
To: linux-thinkpad@linux-thinkpad.org
Subject: Re: [ltp] Thinkpad T40 screen goes dead under Red Hat 9 ..


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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