-   Linux - Newbie (
-   -   how to force x to use a resolution? (

compass 10-15-2007 11:14 PM

how to force x to use a resolution?
Hi all,

I have ibm T23 with supersavage and I have a LCD monitor support 1440x900.
Now I can set my video card up to 1400x1050. Is it possible to force my video to use 1440x900? Or is there a way to word around?


Tinkster 10-15-2007 11:34 PM


and welcome to LQ!

And should be a way to do that - however, it can depend on a few
things as to whether and how that can be done.

a) What distro are you using?

b) Which window manager/desktop environment are you using?


compass 10-15-2007 11:41 PM

Hi, thanks for your reply.

I'm using slackware and gnome as the desktop. I also installed fluxbox.

compass 10-15-2007 11:46 PM

I also found the following messages in xorg.0.log
(II) SAVAGE(0): Supported Future Video Modes:
(II) SAVAGE(0): #0: hsize: 1400 vsize 1050 refresh: 75 vid: 20368
(II) SAVAGE(0): #1: hsize: 1440 vsize 900 refresh: 75 vid: 3989
(II) SAVAGE(0): #2: hsize: 1280 vsize 1024 refresh: 60 vid: 32897
(II) SAVAGE(0): #3: hsize: 1280 vsize 960 refresh: 60 vid: 16513
(II) SAVAGE(0): #4: hsize: 1280 vsize 800 refresh: 75 vid: 3969
(II) SAVAGE(0): #5: hsize: 1280 vsize 800 refresh: 60 vid: 129
(II) SAVAGE(0): #6: hsize: 1152 vsize 921 refresh: 76 vid: 36977
(II) SAVAGE(0): #7: hsize: 1152 vsize 864 refresh: 75 vid: 20337
(II) SAVAGE(0): Supported additional Video Mode:
(II) SAVAGE(0): clock: 89.0 MHz Image Size: 410 x 257 mm
(II) SAVAGE(0): h_active: 1440 h_sync: 1488 h_sync_end 1520 h_blank_end 1600
h_border: 0
(II) SAVAGE(0): v_active: 900 v_sync: 903 v_sync_end 909 v_blanking: 926 v_b
order: 0
(II) SAVAGE(0): Ranges: V min: 56 V max: 76 Hz, H min: 31 H max: 84 kHz, Pix
Clock max 140 MHz
(II) SAVAGE(0): Modeline "1440x900" 136.75 1440 1536 1688 1936 900 903 909
942 -hsync +vsync

(--) SAVAGE(0): No suitable BIOS mode found for 1440x900 59Hz.
(II) SAVAGE(0): Not using mode "1440x900_60.00" (no mode of this name)
(--) SAVAGE(0): No suitable BIOS mode found for 1440x900 49Hz.
(II) SAVAGE(0): Not using mode "1440x900_50.00" (no mode of this name)

Does this mean my card support 1440x900? Thanks

Tinkster 10-15-2007 11:56 PM

Good choice of distro ;}

Does this mean my card support 1440x900? Thanks
Sure does. To enforce it you should be able to add a
line with the explicit resolution to /etc/X11/xorg.conf

Find your screen section, and add Modes "1440x900" to the
resolutions you're wanting to use.

I only assume that your section says Savage for the device,
but you get the gist :}


Section "Screen"
        Identifier      "Default Screen"
        Device          "Savage"
        Monitor        "Generic Monitor"
        DefaultDepth    24
        SubSection "Display"
                Depth          1
                Modes          "1440x900"
        SubSection "Display"
                Depth          4
                Modes          "1440x900"
        SubSection "Display"
                Depth          8
                Modes          "1440x900"
        SubSection "Display"
                Depth          15
                Modes          "1440x900"
        SubSection "Display"
                Depth          16
                Modes          "1440x900"
        SubSection "Display"
                Depth          24
                Modes          "1440x900"


compass 10-16-2007 12:22 AM

Thanks Tink, I added those lines to xorg.conf. When I start fluxbox, the screen is cut from bottom. I checked xdpyinfo, the dimension is 1400x1050. I also tried gnome. The resolution is automatically changed to 1280x1024. It seems my video card does not support it? confused.

compass 10-16-2007 12:52 AM

Here are more info. from xorg.0.log:
(--) SAVAGE(0): Found 13 modes at this depth:
[10e] 320 x 200, 70Hz
[111] 640 x 480, 60Hz, 72Hz, 75Hz, 85Hz, 100Hz
[114] 800 x 600, 60Hz, 72Hz, 75Hz, 85Hz, 100Hz
[117] 1024 x 768, 60Hz, 70Hz, 75Hz, 85Hz, 100Hz
[11a] 1280 x 1024, 60Hz, 75Hz, 85Hz
[11d] 640 x 400, 70Hz
[122] 1600 x 1200, 60Hz, 75Hz, 85Hz
[133] 320 x 240, 72Hz
[13c] 1400 x 1050, 60Hz, 75Hz
[143] 400 x 300, 72Hz
[153] 512 x 384, 70Hz
[173] 720 x 480, 75Hz
[17e] 720 x 576, 75Hz

Does it mean my video card only support those modes?

Tinkster 10-16-2007 03:31 AM

Which colour depth is it pertaining to? And how much video RAM
does the box have?


compass 10-16-2007 03:37 AM

I tried 16 and 24. None of them works.
I have 16m video memory on board. My LCD on laptop has a max resolution of 1024x768 and the external LCD is 1440x900.

Tinkster 10-16-2007 03:55 AM

Which video driver did X pick for the Savage chip? Not that I have
any experience with these ...


compass 10-16-2007 04:03 AM

I think it uses "SuperSavage". See the log:

(II) SAVAGE: driver (version 2.1.3) for S3 Savage chipsets: Savage4,
Savage3D, Savage3D-MV, Savage2000, Savage/MX-MV, Savage/MX,
Savage/IX-MV, Savage/IX, ProSavage PM133, ProSavage KM133,
Twister PN133, Twister KN133, SuperSavage/MX 128, SuperSavage/MX 64,
SuperSavage/MX 64C, SuperSavage/IX 128, SuperSavage/IX 128,
SuperSavage/IX 64, SuperSavage/IX 64, SuperSavage/IXC 64,
SuperSavage/IXC 64, ProSavage DDR, ProSavage DDR-K


(II) SAVAGE(0): Primary V_BIOS segment is: 0xc000
(II) SAVAGE(0): VESA BIOS detected
(II) SAVAGE(0): VESA VBE Version 2.0
(II) SAVAGE(0): VESA VBE Total Mem: 15168 kB
(II) SAVAGE(0): VESA VBE OEM: S3 Incorporated. Paramont BIOS
(II) SAVAGE(0): VESA VBE OEM Software Rev: 1.0
(II) SAVAGE(0): VESA VBE OEM Vendor: S3 Incorporated.
(II) SAVAGE(0): VESA VBE OEM Product: VBE 2.0
(II) SAVAGE(0): VESA VBE OEM Product Rev: Rev 1.0
(--) SAVAGE(0): Chip: id 8c2e, "SuperSavage/IXC 64"
(--) SAVAGE(0): Engine: "SuperSavage"
(--) SAVAGE(0): AGP card detected
(**) SAVAGE(0): BusType set to AGP
(**) SAVAGE(0): Using AGP DMA
(**) SAVAGE(0): DMA disabled
(**) SAVAGE(0): Using AGP 4x mode
(**) SAVAGE(0): Using 16 MB AGP aperture
(==) SAVAGE(0): Write-combining range (0xe8000000,0x4000000)
(==) SAVAGE(0): Write-combining range (0xe4000000,0x4000000)
(==) SAVAGE(0): Using gamma correction (1.0, 1.0, 1.0)
(--) SAVAGE(0): probed videoram: 16384k

jwebster 12-22-2010 12:27 AM

Change Xorg.conf
Option "UseBIOS" "False"
It works for my Acer 1440x900 monitor.
UPDATE:Turn of the built-in LCD by:
Option "CrtOnly" "True"

Now I wonder if xorg can do dual-head xinerama.
UPDATE: Under Windows XP it does.

All times are GMT -5. The time now is 09:44 PM.