[SOLVED] Re: laptop screen always shutdown if no keyboard
interaction for several minutes
zhangweiwu at realss.com
Fri Jan 26 18:27:53 UTC 2007
在 2007-01-23二的 16:47 +0800，Zhang Weiwu写道：
> Hello. I tried various ways to stop the laptop screen from being
> shutting down, as I use this screen to watch debug message of an
> application I am working on, I need monitor always on, no screensaver,
> no blank, no dpms etc.
> I cannot do it. I have tried:
> 1. set blanktime to "NO" in /etc/rc.conf
> 2. set saver to "NO" in /etc/rc.conf
> 3. start X server and run a terminal in it, run xset -dpms
> 4. check laptop BIOS setting (there is no setting for automatic
> blank time
> I have not tried:
> I. remove 'apm' from kernel (I didn't compile ACPI into kernel
> because this is an old notebook I am not sure if ACPI works, but
> I have compiled apm in kernel, which is not shown in dmesg and
> doesn't seem to work, e.g. 'shutdown -p' do not turn off the
> II. install Windows on the same computer to see if Windows can keep
> the monitor on.
> III. boot the system to FreeDOS and see if monitor keep turned up (to
> decide if LCD is turned off by hardware or software)
I have solved my problem. I cannot / didn't make APM work on my FreeBSD
so basicaly turning of LCD/DFP is done by BIOS on its own. So my
problem is actually not related to OS (FreeBSD). The solution:
1) get an IBM BIOS upgrade diskette (do a search on IBM website can find
this diskette very easily;
2) use this diskette upgrade BISO from my current version (some version
released in 1998) to the latest one (released in 1999).
The new bios default setting is chagned a lot, including a change that
by default BIOS lcd turn-off timer is not activated.
If someone got the same problem as I got and don't wish to upgrade BIOS
(as stated in an very early post I found by googling around, the latest
BISO breaks apm feature on FreeBSD, not confirmed and don't know if this
is a problem already solved) you can still get a "Configuration utility
for DOS - ThinkPad General" (UTTPFDOS.EXE) from IBM (now Lenovo)
website. Use it to configure BIOS to turn of timer.
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