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Many thanks for this detailed reply, my monitor is a 20" sgi crt. i |
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prefer sgi we use them at work in drug design they give good 3d. I have |
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the hr and vs rates, where do I put these.Also, is the monitor name |
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needed verbatim. Finally, is there a tool for setting up my initial |
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monitor type and card? Since I'm apprehensive of my setup. |
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Gavin |
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|
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|
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|
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Duncan wrote: |
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|
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>DR GM SEDDON posted <437F0FBC.6010908@×××××××××××××.uk>, excerpted below, |
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>on Sat, 19 Nov 2005 11:42:52 +0000: |
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> |
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> |
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> |
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>>Hi I'm trying to configure my display. I have successfully created a |
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>>xorg.conf file that works. However, I have tried to optimise my display |
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>>as recommended in the manual. From 'lspci' my graphics card is |
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>>unknown. It is an ATI radeon but I entered unknown. I have tried |
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>>'Screen0' and 'default screen'. When I startx I get 'unknown monitor |
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>>type' in the log. Can anyone advise? |
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>>Gavin |
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>> |
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>> |
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> |
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>That's xorg trying to scan the DCC info from the monitor (as most modern |
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>monitors should provide) and failing to get it. It's not complaining |
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>about your graphics card (altho it's possible if it's using the wrong |
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>driver that it won't be able to get the monitor info due to that), but |
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>that your monitor isn't returning any info for xorg to use to set itself |
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>up. |
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> |
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>The below info is for analog video cards and monitors. I'm not sure how |
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>digital ones, lcd and the like, may differ, except that I know their |
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>resolutions are typically lower for their size, they sell by displayed |
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>size, not tube side, so a 19" CRT is usually about the same viewable size |
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>as an 18" LCD (tho the LCD is lower max resolution), and they are more |
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>expensive but not nearly as heavy or bulky! Oh, LCDs also tend to come in |
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>widescreen ratios far more frequently than CRTs! |
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> |
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>The good thing (within context) about LCDs is that they are newer |
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>technology, so often a newer product, meaning it's easier to find specs |
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>for them. If it's a laptop, look for the laptop specs, and you'll get the |
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>video card info at the same time! |
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> |
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>Since xfree86-4 and now with xorg, setting up monitors is generally pretty |
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>easy, even if it can't get the info automatically, because xorg has |
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>default resolution and timing modes that it will use, given the basics. |
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> |
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>man xorg.conf, take a look at the monitor section, then google your |
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>monitor (if necessary) and get the necessary specs. I've done this with |
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>more than half dozen used monitors that needless to say I had no manuals |
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>for, thus no from the factory specs. They are generally fairly easy to |
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>find, once you feed google the make and model number of your monitor. |
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> |
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>The numbers you will need: |
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> |
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>Horizontal sync, normally in KHz. Here's the numbers from one of mine, |
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>from xorg.conf, to give you an idea of the range. (Don't just use mine, |
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>if it's wrong and you let the monitor go for long, it can burn it out!) |
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>High resolutions will use near the top end. The bottom end isn't used |
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>much any more, unless you like to use xorg's ctrl-alt-numplus and numminus |
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>sequences to zoom, as I often do, and want to get close to the min |
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>resolution as well. |
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> |
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> HorizSync 30-110 |
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> |
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>Vertical refresh, normally in Hz. High resolutions will use lower numbers |
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>here. The high end is the one not so often used any more. Note however |
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>that most folks can't stand refresh rates below 60, and many need 75 or |
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>better to be comfortable. Of course, that means you can't drive it to as |
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>high a pixel-count resolution. Here, I can tolerate 60 Hz with dark |
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>backgrounds and light text/foregrounds, so mostly dark. With a white |
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>screen background, I need higher refresh rates, 68-75. Again, here's mine |
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>to give you an idea, but don't just use mine. |
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> |
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> VertRefresh 50-180 |
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> |
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>Those will go in the Monitor section. You can use xorg's autosetup (there |
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>are several choices for tools to try) to generate a basic xorg.conf, then |
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>create or change the Monitor section as necessary. |
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> |
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>Two option but useful numbers for the same section, if you can find them. |
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>Dotclock, usually in MHz (maximum typically runs ~230-ish with a decent |
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>monitor), and DisplaySize in x and y mm. xorg usually does fine without |
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>the former if you can't find it, by using the numbers above. The latter |
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>is only used to ensure semi-normal font sizes, otherwise various versions |
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>may change the default font size, if they can't find it and you didn't set |
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>it, rather drastically, for the same settings in your X environment. |
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>Thus, it's not vital, but it's nice to have, and usually pretty easy to |
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>find, tho you might have to do a bit of inch/mm conversion (25.4mm/inch). |
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> |
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>The other place your monitor numbers come into play is in the Display |
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>subsection of the Screen section, in the Modes listing. This is just a |
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>listing of the main and any additional pixel resolutions you may desire |
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>(that xorg agrees are possible given the settings for video card and |
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>monitor). If your numbers are good enough, and your screen large enough, |
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>2048x1536 is the highest practical resolution available (assuming the |
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>standard 4x3 ratio) -- but only on 20" and larger monitors or it's |
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>overkill. 1600x1200 is, however, often the rated maximum for the 19-22" |
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>monitor size, and more comfortable for many, particularly as it allows a |
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>higher refresh rate. (Monitors rated for 75 Hz refresh at their rated |
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>maximum, however, can generally do 60 Hz at higher resolutions, if your |
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>eyes can stand it, of course.) For a 19" monitor, 1280x920 resolution |
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>(4x3 ratio) or 1280x1024, altho that gives you rectangular pixels. For a |
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>17" monitor, 1280x1024 is high end, 1024x768 is standard. 15" do 1024x768 |
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>and 800x600. Old and small monitors will generally do 640x480, 800x600 if |
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>you are lucky and can tolerate the lower refresh. |
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> |
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>Here's one of my screen mode line entries, listing all the resolutions I |
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>run (22" monitor, the highest normally resolution normally, lower ones for |
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>zoom, using the zoom keys mentioned above, DisplaySize is 400x300mm, so at |
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>that resolution, my pixels are a full mm square!). Most folks probably |
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>don't have half that many resolutions (plus many won't want to run |
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>2048x1536 at the refresh possible on their monitor, even if they can, so |
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>that and the 1792 resolution won't be so common). Note that the 640x480 |
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>resolution is square pixels, the 640x400 isn't, but I have a game that |
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>runs that, so... That one is also a custom modeline, as well, as it's not |
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>one that xorg has preconfigured. |
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> |
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>Modes "2048x1536" "1792x1344" "1600x1200" "1280x960" "1152x864" "1024x768" "800x600" "640x480" "640x400" "512x384" "400x300" "320x240" |
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> |
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>It should be easy to find the maximum resolution for your monitor, as |
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>that's one of the selling features, so even hits that don't list anything |
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>else often list that. |
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> |
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> |
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> |
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|
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-- |
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