This chapter describes how to change the display resolution on the SX Frame Buffer (cgfourteen). If you want to run OpenWindows on a SPARCstation 10SX system or a SPARCstation 20 system, you may need to perform additional configuration tasks after the initial installation.
You can use the /usr/kvm/cg14config utility to:
For more information, see the cg14config man page.
Table 4-1 lists the monitors supported by the SX Frame Buffer and the alternate screen resolutions, if any, that each monitor supports.
Table 4-1 Monitors Supported by SX
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Model Sun Part Type and Size Monitor ID Supported Resolution and Number Sense Code Refresh Rate ---------------------------------------------------------------------------------------------------------------------------------------------------
GDM-20D10 365-1167-01 Color 20" 4 1152 \xb4 900 at 76 Hz
1280 \xb4 1024 at 67 Hz
1280 \xb4 1024 at 76 Hz
1152 \xb4 900 at 66 Hz
GDM-1955A15 365-1081-01 Color 19" 3 1152 \xb4 900 at 66 Hz
GDM-1962 365-1095-01 Color 19" 4 1152 \xb4 900 at 76 Hz
1280 \xb4 1024 at 67 Hz
1152 \xb4 900 at 66 Hz
GDM-1962B 365-1160-01 Color 19" 4 1152 \xb4 900 at 76 Hz
1280 \xb4 1024 at 67 Hz
1152 \xb4 900 at 66 Hz
GDM-1604A15 365-1079-01 Color 16" 3 1152 \xb4 900 at 66 Hz
GDM-1662B 365-1159-01 Color 16" 6 1152 \xb4 900 at 76 Hz
1152 \xb4 900 at 66 Hz
1280 \xb4 1024 at 67 Hz
CPD-1790 365-1151-01 Color 16" 3 1152 \xb4 900 at 66 Hz
1024 \xb4 768 at 76 Hz
GDM-20S5 365-1168-01 Grayscale 20" 2 or 1280 \xb4 1024 at 67 Hz
4* 1152 \xb4 900 at 76 Hz
17SMM4 A 365-1100-01 Grayscale 17" 6 1152 \xb4 900 at 76 Hz
Non-Sun -- Unknown 7 1152 \xb4 900 at 66 Hz
Resolutions in bold type are the default resolution at power-on initialization.
* Monitor ID sense code is user-selectable by switch on rear.
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Table 4-2 lists the default screen resolutions by monitor ID sense code.
Table 4-2 SX Frame Buffer Monitor Sense Codes
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Code Screen Resolution -------------------------------------------------------------
7 1152 \xb4 900 at 66 Hz
6 1152 \xb4 900 at 76 Hz
5 1024 \xb4 768 at 60 Hz
4 1152 \xb4 900 at 76 Hz
3 1152 \xb4 900 at 66 Hz
2 1280 \xb4 1024 at 76 Hz*
1 1600 \xb4 1280 at 76 Hz*
0 1024 \xb4 768 at 60 Hz
* The 4-Mbyte VSIMM drops to 8
bits per pixel at these resolutions.
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To change the screen resolution, use the cg14config command with the following format:
where
device is the cgfourteen device to configure. The default is /dev/fb.
resolution is one of the values listed in Table 4-3.
Table 4-3 SX Supported Screen Resolutions
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resolution Screen Resolution ------------------------------------
1600x1280@66 1600 \xb4 1280 at 66 Hz
1280x1024@66 1280 \xb4 1024 at 66 Hz
1152x900@66 1152 \xb4 900 at 66 Hz
1152x900@76 1152 \xb4 900 at 76 Hz
1024x800@84 1024 \xb4 800 at 84 Hz
1024x768@70 1024 \xb4 768 at 70 Hz
1024x768@66 1024 \xb4 768 at 66 Hz
1024x768@60 1024 \xb4 768 at 60 Hz
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For example, to change the screen resolution to 1280
After starting OpenWindows, the window server configures the SX Frame Buffer to support the maximum pixel depth for the screen resolution and frame buffer memory size that you selected. Typically, 32 bits are allocated to each display pixel. But, on the 4-megabyte SX frame buffer, you can increase the screen resolution by choosing a depth of 16 bits per pixel, with some loss of features.
Any frame buffer memory not visible on the monitor display is available to the window server for storing pixmaps. If you want to maximize the amount of off-screen pixmap storage available for your applications, you may need to add the line
to the cg14 frame buffer entry in the /usr/openwin/server/etc/OWconfig file. This forces the window server to initialize the SX Frame Buffer at 16 bits per pixel, regardless of the frame buffer memory size. Table 4-4 summarizes the available features at the 16-bit and 32-bit pixel depths.
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Underlay Visuals 32-bit 16-bit --------------------------------------------------------------------
24-bit TrueColor Yes No
8-bit PseudoColor Yes Yes
8-bit StaticColor Yes Yes
8-bit Greyscale Yes Yes
8-bit StaticGrey Yes Yes
8-bit TrueColor Yes Yes
8-bit DirectColor Yes Yes
Overlay Visuals
8-bit PseudoColor Yes Yes
Double Buffering
24-bit pixmaps Software No
8-bit pixmaps Hardware Software
Note: Overlay visuals are limited to 230 colors.
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To support the addition of overlay visuals in Solaris 2.4, the minimum SX Frame Buffer depth has been increased from 8 bits to 16 bits per pixel. If you are using pixelmode="8" and also upgrading from the Solaris 2.3 to Solaris 2.4 software environment, you may notice some performance degradation of some of the Xlib functions in OpenWindows.
