sjaglin Posted January 19, 2006 Report Share Posted January 19, 2006 Just added options nvidia NVreg_EnableAGPFW=1 to modprobe.conf, do I need to reboot to validate this change? Stef Quote Link to comment Share on other sites More sharing options...
daniewicz Posted January 19, 2006 Report Share Posted January 19, 2006 I do not know if a reboot is required. It certainly won't hurt so that is what I would do. :D Is there anything regarding Fast Writes in your BIOS? Make sure Fast Writes are enabled in your BIOS as well. Quote Link to comment Share on other sites More sharing options...
sjaglin Posted January 19, 2006 Report Share Posted January 19, 2006 Yep, I enabled fastwrites on the bios at first but still I had to "force" it in the modprobe file. I then relogged in KDE but that was not enough, a reboot was necessary. The perf. in term of FPS in glxgears is more or less the same but Quake 4 is now running really smoothly despite a poor 128mb fx6800. I played all the afternoon on using my toshiba 32'' flat panel LCD tv using the pc-in and I am still shacking from the experience (toshiba 32WL56 £799 from BE direct)... Well, I m going back on it now!!! Stef Quote Link to comment Share on other sites More sharing options...
chalex20 Posted January 19, 2006 Report Share Posted January 19, 2006 I do not know if a reboot is required. It certainly won't hurt so that is what I would do. :D <{POST_SNAPBACK}> Actually, no reboot is required. To reboot would be just the easiest way for a newbie. For an experienced one, "exit and stop X" - "modprobe -r nvidia" - "depmod -a" - "modprobe nvidia" - "restart X" would fully suffice. Quote Link to comment Share on other sites More sharing options...
mini Posted January 20, 2006 Author Report Share Posted January 20, 2006 I have enabled Fast Writes with the relevant option to nvidia module. That was reported correctly in /proc/driver/nvidia/agp/status, unfortunately no improvement to glxgears performance whatsoever :( I then disabled AGP support completely with Option "NvAgp" "0" in xorg.conf file. This in turn did not decrease performance of glxgears whatsoever. Does it mean that my AGP doesn't work even if /proc/driver/nvidia/agp/status says it does? I have been trying then to use nVidia NVAGP driver rather than standard AGPGART to check if that's maybe problem with agpgart. Unfortunately I can't use nvagp if agpgart was previously loaded and it does gets loaded. Since lsmod | grep agp produces no output does it mean that agpgart was statically linked to my kernel? Anyway that doesn't look good, I probably shall issue a bug/problem report on nvidia website... Thanks for help! P.S. chalex20 AFAIK there is no need to use "depmod -a" step to reload nvidia module with new options Quote Link to comment Share on other sites More sharing options...
daniewicz Posted January 20, 2006 Report Share Posted January 20, 2006 I don't know if this will work. You could try renaming agpgart.ko.gz to agpgart.ko.gz.hide and setting "NvAGP" "1" to remove kernel AGP support (AGPGART). Quote Link to comment Share on other sites More sharing options...
mini Posted January 20, 2006 Author Report Share Posted January 20, 2006 I didn't find agpgart.* in /lib/modules/2.6.12-14mdk/ I guess it does mean it's a statically linked module. To try out nvagp I would have to recompile the kernel. I would like to ask for a favor: could someone please who has an nVidia card temporary switch off AGP support with Option "NvAgp" "0" in xorg.conf file, "Device" section and let me know how much it decreased the performance of the card in glxgears!? I would know then if AGP is a good lead Quote Link to comment Share on other sites More sharing options...
daniewicz Posted January 21, 2006 Report Share Posted January 21, 2006 (edited) I have an old AGP 2x 64MB GeForce2 video card. With AGPGART loaded and an AGP Rate of 2X, glxgears gives 857 With Option "NvAgp" "0" glxgears gives 842. Hope this helps. only a 1.8% decrease, I expected more......... :o Edited January 21, 2006 by daniewicz Quote Link to comment Share on other sites More sharing options...
daniewicz Posted January 21, 2006 Report Share Posted January 21, 2006 I have been trying then to use nVidia NVAGP driver rather than standard AGPGART to check if that's maybe problem with agpgart Is AGPGART being loaded by an entry in modprobe.preload? Comment out amd-k7-agp with #amd-k7-agp Quote Link to comment Share on other sites More sharing options...
mini Posted January 21, 2006 Author Report Share Posted January 21, 2006 Nop, I don't think agpgart is loaded by modprobe.preload. I had there an entry amd64-agp which I commented out but it seemed to be a bogus one. It did got reported as loaded in /var/log/messages but then I've tried also to load some fake module and it was similarly reported in /var/log/messages as loaded. I expect agpgart was precompiled in my kernel though I'm not really sure how can I prove it. Does anyone knows a command or text file listing modules precompiled in running kernel? The difference between 857fps and 842fps is indeed small. Probably would be bigger for a new card that is more demanding on system resources!? One more question: does running glxgears takes also for you 100% of CPU? Quote Link to comment Share on other sites More sharing options...
daniewicz Posted January 21, 2006 Report Share Posted January 21, 2006 Yes. Running glxgears requires 100% CPU as measured by the KDE System Guard. Quote Link to comment Share on other sites More sharing options...
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