Hello!
I bought Acer AL1715sm. I have Mandrake 10.0. What I'll have to do to get Mandrake work with Acer. I had CRT-monitor before Acer. Now when I'm trying to boot Mandrake, I'll get "input not supported". I can use Mandrake text-based, but I want to get X to work.

You will need to edit /etc/X11/xorg.conf and change the refresh rates.

No such file. I tried with /etc/X11/XFree86Config-4. I changed Horizsync and Vertrefresh and I reboot. But didn't got the X work.

Hello,

Well if it's of any use I've just picked up a reasonably cheap LCD monitor (£ 142 UK) which I've used to swap out a dying 15" CRT. The first step I took was to boot from a Knoppix 3.7 CD and, once it had booted up, I looked at the /etc/X11/XF86Config4 file that Knoppix created to find the relevant "HorizSync" and "VertRefresh" values for the monitor.

I then shut the machine down, plugged in the old monitor, rebooted, and edited my /etc/X11/xorg.conf file to add a new "Monitor" section specifying the "HorizSync" and "VertRefresh" settings Knoppix used. The new monitor section I added looks like this (apologies for the indenting getting messed up):

Section "Monitor"
  Identifier "Digimate 1718"
  Option "DPMS" "true"
  HorizSync 28.0 - 96.0
  VertRefresh 50.0 - 75.0
End Section


Next step was to edit my "Screen" section to put this new monitor entry in place of my previous one (and whilst I was at it I also added a "1280x1024" resolution to each display mode to match the capabilities of the new monitor). So my amended "Screen" section now looks like this:

Section "Screen"
  Identifier "Screen0"
  Device "GeForceMX440"
# Monitor "Compaq V50" <------This was my old 15" CRT monitor
&nbsp; Monitor "Digimate 1718"
&nbsp; DefaultColorDepth 16
&nbsp; SubSection "Display"
&nbsp;&nbsp; Depth 1
&nbsp;&nbsp; Modes "1280x1024" "1024x768" "800x600" "640x480"
&nbsp; EndSubSection
&nbsp; SubSection "Display"
&nbsp;&nbsp; Depth 4
&nbsp;&nbsp; Modes "1280x1024" "1024x768" "800x600" "640x480"
&nbsp; EndSubSection
&nbsp; SubSection "Display"
&nbsp;&nbsp; Depth 8
&nbsp;&nbsp; Modes "1280x1024" "1024x768" "800x600" "640x480"
&nbsp; EndSubSection
&nbsp; SubSection "Display"
&nbsp;&nbsp; Depth 16
&nbsp;&nbsp; Modes "1280x1024" "1024x768" "800x600" "640x480"
&nbsp; EndSubSection
&nbsp; SubSection "Display"
&nbsp;&nbsp; Depth 32
&nbsp;&nbsp; Modes "1280x1024" "1024x768" "800x600" "640x480"
&nbsp;EndSubSection
EndSection


Following this I powered down, connected the new LCD monitor, and powered back on. 1 minute later and I'm now in X and the new LCD looks positively lovely. I daresay I can tweak it a bit to get a nicer desktop (fonts etc.) but it's certainly now usable.

So having done a quick google for your monitor this revealed that the settings for your screen should be:

Section "Monitor"
&nbsp; Identifier "Acer AL1715SM"
&nbsp; HorizSync 31.5 - 80.0
&nbsp; VertRefresh 56.3 - 75.0
End Section

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
N.B. If you're going to try the above settings PLEASE check your manual first. I don't want you blaming me if it blows up as I only did a quick Google and took the first specifications I found If in doubt I'd strongly suggest you try using a Knoppix CD first as it really is excellent at this sort of thing.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

P.S. The page I got your monitor specifications from is:

http://shop.pulsar.it/oscomm/product...2581a38fac9bf1

Use Mandrake Control Center and just pick your new monitor from the list, or pick the generic LCD one if it's not there. Mandy will straighten out the X config file for you. Doesn't get any easier than that!