From what I have gathered 10.4 suffers from similar video problems that 9.10 did. One issue is that 9.10 and apparently also 10.4 oftentimes can't access the video screen correctly to determine the screens capabilities.
If you use the Vesa driver and you know your screen resolution, you can force the Vesa driver to set the video which apparently gets rid of some of the screen flickering issues etc. Another user, and then I found that the D510 intel board with the onboard intel GMA3150 video had an issue with 9.10 so I wrote up a work around for the D510 board. If you are going to use the Vesa driver perhaps this would be some help. Go to this page... http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC_Ubuntu91 And scroll down to the bottom where it says: "*Note Relating to "cannot load the i810 module" error when first booting compiled Kernel:*" The "xorg.conf.failsafe" file is setup to use the Vesa driver.. so this procedure just sets things up so the vesa driver is used and then describes how to set the config file so it is optimal for the monitor you have connected. This doesn't fix any Linux issue, it is really a work around. Dave On 5/23/2010 7:20 AM, Mark Wendt (Contractor) wrote: > At 09:35 PM 5/22/2010, you wrote: > >> On Saturday 22 May 2010, Michael Jones wrote: >> In fact, I have found that even the nv driver makes the latency >> figures suck. >> Not nearly as bad as the nvidia drivers though. When I first built up my >> micromill, I was not able to get it to move more than 3 or 4 IPM without >> stalls, so on IRC one night someone suggested I try the nv driver, so I >> converted it back to use the nv driver. >> >> It was enough better that I could get it into the teens per minute before the >> stalls started. And I noticed the motors sounded a little more musical but >> the tones weren't really all that pure. >> >> Someone a few weeks later said I should try the vesa driver, which does limit >> the screen resolution a bit but its usable, and my 20 tpi X and Y tables can >> now run at 25 IPM, which quite pure sounding tones, no raggedness to them at >> all. >> >> The Z was another surprise, as I had excised the original 20 TPI screw that >> ran up the back of the post, in favor of a 10 tpi that by turning the gear >> head 90 degrees, allows clearance past it to grab the Z sled about 2" in >> front of the post where the bolt is anchored solidly and doesn't turn. With >> a 425 motor on the OEM lashup, the sled was bound on the post and incapable >> of running a bathroom scale past about 5 pounds before the 425 started >> cogging in place. >> >> Now, with the screw in front of the post, and the nuts that drive it sitting >> in bearings located above the post and inline with the bolt, a 17 tooth >> pulley on the 425, and a 42 tooth pulley turning the nuts, I can run it down >> on the bathroom scales to 155 lbs before the motor starts cogging. And I >> can, if nothing gets in the way, run the Z axis at 34 IPM if the post is >> relatively clean& lubed with vactra. >> >> >>> I can't find anything on this, but will the NV drivers actually load >>> some form of OpenGL so axis will run or am I just spinning my wheels? >>> >> I don't know as openGL runs with the vesa driver, and I'll let Alex confirm >> or deny that axis needs openGL. Whatever that answer is, its running the >> machine very well, on a 9 year old video card. Yes, the video could be >> better, but the machine runs great. >> >> >>> I don't think I loaded the proprietary Nvidia Drivers last time (I >>> can't be sure, it was a long time ago) and axis ran just fine. >>> >>> Recommendations? >>> >> Try the vesa driver, its much kinder to the latency than anything else I have >> ever tried. >> > Do we have any recommendations for a video card and driver that > doesn't cause problems. I loaded a machine at work with Ubuntu 10.4 > LTS. I had two ATI cards on hand, a Rage, and a very high end ATI > that had it's own power plugin from the computer's power supply. I > couldn't get either of them to work worth doo-doo using either the > generic drivers or the so-called "ATI" something or other > drivers. Screen had dropouts, color weirdness, would flicker > occasionally and other oddness. Since neither board would work very > well, I ended up with an Nvidia board. But with the report problems > of Michael and Gene, what other options do we have? > > Mark > > > > ------------------------------------------------------------------------------ > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
