On 2/19/2012 12:51 PM, Viesturs Lācis wrote: > 2012/2/19 Alan Browning<ajbrowning2...@yahoo.com>: >> I'm in the beginning stages of planning a DIY CNC machine using Ubuntu and >> LinuxCNC. The Problematic Hardware section of the doc says that onboard >> video is problematic. > I think that the statement about onboard video cards being problematic > is either obsolete or is true for specific mainboard models, because > there is huge number of LinuxCNC users that have D510MO / D525MW > mainboards in their LinuxCNC machines and are very happy about them. > Latency numbers are good and there are no complaints about videocard > performance. > I have built 4 such machines and will continue on using this exact > line of mainboards in future. > > Viesturs > As always, try to test before committing. As Viesturs said, "...or is true for specific mainboard models." The trouble is, we don't seem to have a workable method for determining which specific models based on paper specs.
If you look at the Latency-Test results on the wiki (http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Latency-Test) you'll find three sets of numbers posted for the ASUS AT5NM10-I motherboard, which, like the Intel D510MO, is based on an Intel Atom D510 and the Intel NM10 chipset. Of these, I posted the second and third set. The second set is the result of running with on-board video. The numbers are good and some 6000 ns better than the first set posted by someone else. (I believe the improvement was due to setting the isolcpus boot parameter.) The third set is the result of running with *no* video on the board (e.g., with a separate computer running the X server and remote display). The numbers are better than the second set by some 3000 ns to 6000 ns. YMMV. This is not intended to endorse the ASUS motherboard but to point out that any board should be tested in the configuration one intends to use before it is adopted. The good news is that any of these sets of numbers mean this specific board would be usable in many systems. The bad news is that the vendors seem to turn out new board designs every 6 months to a year so the data in our Latency-Test table as well as our rules of thumb get stale quickly. Did I mention test before committing? Regards, Kent ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
