[ltp] Physical screen size of the Thinkpad X31 and powersave mode

[Alex Deucher]

On Fri, 3 Sep 2004 09:51:29 +0200, R=E9mi Lambert <r.lambert@ulg.ac.be> wro=
te:
> Hello,
>=20
> I've a (small) problem with my brand new thinkpad X31 (type 2672-C8G), an=
d
> a small question about powersave mode.
> First, let me introduce myself... I'm using SuSE 9.1 (KDE3.3) without any
> problem, wifi & wep included. The screen resolution is 1024x768.
>=20
> If I connect a LCD projector, the image of the screen projected on the wa=
ll is
> only a region of the total screen, and the image scrolls when I move the
> mouse (just like a virtual desktop). It seems that the LCD projector does=
n't
> understand that the screen resolution is 1024x768 and uses the default
> resolution of 640x480 (or 800x600, I don't know)... It is not very
> comfortable for making presentations...

it's actually a feature ;)  The radeon driver uses both crtcs all the
time so that each head can use independant timings (that way you won't
fry your old crappy monitor if you plug your 1024x768 laptop into a
640x480 monitor).  The problem is your project doesn't provide DDC
information so the driver defaults to the default hsync and vrefresh
(which is basically 640x480@60Hz).  depending on which version of X
you are running you can either disable clone mode (in which case crtc1
drives both displays with the same timings) or specify the hysnc and
vrefresh ranges for your projector for crtc2 as driver options.  See
the radeon man page.  If you are using xfree86 or xorg 6.7 the options
all start with "Clone" if you are using DRI cvs or Xorg 6.8/cvs the
options start with "CRT2" and "mergedfb". Either way all options are
fully documented in the man pages.

Alex


> At each startup of KDE 3.3, I get the following message :
> -------------------- [ snip ] ------------------------
> Your monitor didn't report it's X- and Y-size, this might cause display
> problems like unreadable fonts. Do you want to configure your monitor
> geometry manually ?
> -------------------- [ snip ] ------------------------
> (I had this message with KDE 3.2 too).
>=20
> I think this would maybe fix the LCD projector problem.
> Under window$ XP Pro, the screen is correctly (totally) projected on the =
wall
> thus it's not a lcd projector problem.
>=20
> I wrote to IBM technical Support to ask the exact X- and Y-sizes of the s=
creen
> but got no answer (they say that they can't get this information !!!). I =
know
> that the screen is 12" but I want to know exactly its width and its heigh=
t,
> in millimeters. Does someone has these lengths in its version of Linux (y=
ou
> can get them in SaX2, screen properties, expert tab) ??
>=20
> Another question... I have the powersaved daemon running and I can activa=
te
> the standby mode and the suspend mode. But what's exactly the difference
> between those two modes ???
> And what can I do to get the computer off this sleeping mode ? Pressing t=
he
> "poweron" button at the top of the keyboard, is it correct ?? (remember t=
hat
> I've a dual boot SuSE-XP Pro)
>=20
> How can I do to get the Thinkpad automatically going to suspend mode when=
 I
> close the LCD ?
>=20
> Thank you very much for your help !!
>=20
> RL