Hey, I just recently switched to Linux about a week and a half ago, and for some reason, it just hates me. I have this horrible Graphics problem, where the screen flickers and freezes constantly. After talking to an NVIDIA guy about this, he proposed (after some tweaking with settings), that somehow my motherboard isn't stable with my AGP card at higher speeds.
Now, this seems all and fine, get a new card, right? But this is the problem: It cant possibly be that, unless Windows doesnt use 8x AGP all the time. On Windows XP, I would play games like UT2004, Doom 3, Quake 4, with absolutly no problems what so ever (besides whats beyond my hardware limits), and yet when I go to Linux, I have problems with this stuff out of my arse. After setting a Device option "NvAGP" to "0" it fixed the problem, but MURDERED my performance. I used to play UT2004 at full settings, no problem. Now, I have it at less than Low in some places, and yet I still lag. Any other option on that NvAGP setting either makes it lag more, or returns the flickering and freezing.
So heres the question: What speed does Windows normally run AGP cards at? And how can I change the rate in which Fedora Core 6 works mine? (Perhaps tune it to 4x)
Thanks for any help on this.
ID:183982
 Feb 9 2007, 3:48 pm
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You can change the rate in the BIOS of your computer, normally.
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Yeah. All that stuff was covered when I talked to the Nvidia dude. If you want, I'll upload the entire conversation between me and him through email.
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Thats what I thought, but I couldnt find anything about AGP Rate in my Bios, the only thing I could find was AGP Overheat shutdown.
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That's strange. Every BIOS I've seen attached to a motherboard with AGP slots lets you set the AGP rate.
If it works fine with windows, then I'd suggest that your linux distro doesn't like your motherboard much. Or graphics card. Or something. Except that Nvidia cards tend to work well in linux, in my experience. I don't know. I'm really not much of a linux expert, I'm afraid. (Oh, setting NvAGP to 0 is probably disabling your card, which is why it's slow) | |
I dont have an onboard card though. It might disable every feature it has, though, using just the bare abilites of the card. I dunno, it's getting aggrivating, because I know my computer can do so much better.
I know that some windows apps have problems with Geforce 6800 cards, so I might be thinking that is the problem. I really doubt my Motherboard is unstable like the NVidia guy said, or it wouldnt work correctly in Windows either. | |
Try adding
option "NoAccel" To your X configuration file under the monitor settings, probably the same place you add the NvAGP line. If that doesn't clear up the problem it may be a driver issue. Try it with and without the NvAGP line. | |
Alright, Ill try that. After I told the Nvidia guy that the NvAGP setting helped, he just like abandoned me, which was annoying. I'll tell ya how it turns out =P
Edit: I got a question. In my xorg.conf configuration file, it has this: Identifier "Videocard0" for my VCard. Could that be a problem? also, it didnt work without NvAGP. But I switched NvAGP to 1 (Where it uses the kernel that doesnt cause the freezing, but increased lag alittle.) | |
Ah that did it! I could set NvAGP to 1, so it used some type of AGP plugin to access my Vcard, and now I can actually run programs with my real video card. I must have had some really bull one integrated on my motherboard that I didnt know about or something, because UT2004 looks a lot better on the same settings now, and it runs almost smoothly. For some reason though, when I enter new areas it seems to lag alittle, but its probably nothing major, I bet it normally does whatever it does, I just notice because Im not on perfect performance settings. I still have no idea why other AGP plugin doesnt work, the one for setting 2/3 (3 uses both the Nvidia one and the other one)...oh well. At least its working now. Thanks Nadrew.
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But have you updated/installed your graphics newest driver?.