Teach Yourself Linux in 24 Hours (2)

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.See Figure 3.1 for an example of the output when Xconfigurator successfully probesfor a card.If the program can t find a card when probing, it brings up a list of cards and servers.Figure 3.1.Pay special attention tothe information in thisscreen.3Configuring the X Window System 35If you manually installed the X server earlier and it doesn t match what theXconfigurator finds, the configuration program aborts.Install the properX server and then begin the configuration process again.JUST A MINUTEIf you can t find your card on the list of servers, you should try to use the SuperProbe program.Running that probes the card directly and outputs what video chipset, amount of memory,and RAMDAC chipset it found.The SuperProbe command can lock up the machine and with a very fewcards cause other problems.Read the man page on SuperProbe (manSuperProbe), and if you aren t comfortable with the possible risk, don tCAUTIONrun it.3If you still haven t found a chipset that matches your system, you need to use the VGA16 orMono server, as these are the lowest common denominators available.When choosing avideo card, you also should be aware that video card manufacturers like to use namerecognition but also use the best technology available for their card.Sometimes this resultsin two cards with similar names having very different chipsets and it s the chipset Linuxcares about.So, you may set up the servers thinking you have one chipset, and when finallystarting the server get errors telling you that the card is not being detected.Selecting Your MonitorThis section shows you how to configure the X server to choose your monitor type.You needto have the monitor specifications for your computer.Be very careful to select the settings that conservatively match yourmonitor.Choosing bad values can seriously damage your monitor.CAUTIONAfter selecting a video card, you are asked to set up the monitor of the computer.You shouldthen be presented with a screen, shown in Figure 3.2, that asks about the monitor on yoursystem.Scroll down the list and choose a monitor name if it exactly matches your monitor sbrand and model.If you know that your monitor is very similar to one in the list, you mightbe able to choose that one also.If you don t find your monitor listed, you need to select ageneric monitor or the custom setting.36 Hour 3Figure 3.2.The monitor selectionscreen.Configuring a Custom MonitorIf you choose to use a custom monitor, you are presented with a screen explaining that youwill be asked for the vertical and horizontal sync rates of your monitor.Your monitor smanual should give these listings, usually in the Specifications section.Select Ok to continue.You are then asked for the horizontal sync range of the monitor.In choosing a rate, youshould be very conservative about the type of settings if you don t see what your monitor iscapable of.Most monitors should be able to display what is called Standard VGA.Next, youneed to select the vertical range your monitor is capable of, and you again need to beconservative.Final Server ConfigurationThe next screen depends on whether a PCI video card was detected or not.If one wasdetected, you are told that the installation will probe for correct video settings and ranges thatare available.If no PCI card was detected, you are given a choice of probing or not.The reasonfor the choice is that some older ISA video cards do not accept probing and lock up the systemif it is attempted.Choosing to probe the system causes the screen to blink several times as Xconfigurator figuresout what the card s available color depths are.You then see another screen that informs youwhat screens Xconfigurator recommends as a default setting, and gives you the choice to takethose values or select others.In selecting others, you are given a selection of all video sizes andcolor depths that can be supported by the X server and monitor (see Figure 3.3) [ Pobierz całość w formacie PDF ]

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