Please see my comments: Am 02.01.2016 um 16:39 schrieb Jeff Epler: > On Sat, Jan 02, 2016 at 01:08:41PM +0100, Niemand Sonst wrote: >> I took the first hurdle, the UEFI Bios and could install Debian 8.2 - >> amd64 - MATE, but the second hurdle installing LinuxCNC from the ISO >> could not be taken, because UEFI Bios only accept 64-bit operating >> systems, even with security boot disabled! > I am sorry you purchased defective hardware. You should consider > returning it for a refund if you still can.
The hardware is not defect, it is just new and does what it is suposed to do. In future we will see any more hardware with BIOS. The UEFI is the new BIOS and Acer is one of the few manufactures supporting also the custom mode. By the way, Microsoft himself insistat in that mode to allow other OS to be installed on the hardware. > [...] >> After sorting most of the stuff out, I added the linuxcnc repositories: >> >> deb http://buildbot.linuxcnc.org/ jessie 2.7-rtpreempt >> deb-src http://buildbot.linuxcnc.org/ jessie 2.7-rtpreempt >> >> and installed LinuxCNC. >> >> OK Latency test shows 32035966 ns, that is the highest I ever got! Even a >> virtual machine is better ;-) But i did no optimation till now. > It is quite likely that after performing these steps *you are not > operating with a realtime kernel*. uspace will run both on vanilla > kernels (but without using realtime task priority) and on preempt-rt > kernels (using realtime task priority). Only in the latter case (and if > your computer has acceptable RT performance) will you get good latency. You are right, no realtime kernel till now! The coment in buildbot should be adapted to reflect this and make clear there is no rt Kernel for Jessie. > Unfortunately, a preempt-rt kernel is not currently available from > Debian for 8.x -- there *was* one in jessie-backports, but they deleted > it. > > Seb's RTAI kernel for 64-bit systems crashes, so I similarly can't > recommend that. Sep, if you go on with the development, let me know, I am willing to test. > However, for developing user interface software, uspace non-realtime is > typically adequate. For running attached hardware over ethernet, not so For sim development no reason for the rt-kernel, but I test my stuff also on hardware! > much. I woudln't recommend it even for testing. > >> After installing "gstreamer0.10-plugins-base" the start went OK. Jeff could >> you please add that dependence? > Yes. Done. Thanks. >> Neverthereless the code for both GUI must be adapted to avoid such an error, >> only for not beeing present "sound". I will fix that as soon as my >> new development system is running. >> >> I do connect the laptop with WLAN0 to the world and want to use eth0 to >> connect to a MESA 7i76E to control my testing hardware. >> But as far as I found out till now, that will not be possible, because ther >> is no realtime kernel for Jessie 64 bit >> and the info on buildbot is not correct. > So, nobody has written the install instructions for Debian Jessie with > preempt-rt. It should be possible using snapshot.debian.org, which > still has an archive of the preempt-rt kernel from jessie-backports. > (The kernel was withdrawn not because it was broken, but because Debian > testing's development moved on to a kernel without a RT patch) > > http://snapshot.debian.org/package/linux/4.1.3-1/ > > .. but having just spent 15 minutes trying to do so I haven't yet been > successful at getting apt to automatically download and install these > packages. I will look on that and keep you informed. >> - Does wheesy support 64 bit completly ? > I used wheezy with preempt-rt kernel in the past. There is a preempt-rt > kernel in main for wheezy. > https://packages.debian.org/search?suite=wheezy&keywords=linux-image-rt-amd64 > > Jeff So I will try to make another installation with Wheesy. > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
