On Tuesday 08 November 2016 11:22:13 Mark wrote: > On 11/08/2016 10:52 AM, Gene Heskett wrote: > > On Tuesday 08 November 2016 07:59:16 Mark wrote: > >> On 11/07/2016 12:17 PM, Gene Heskett wrote: > >>>> I ran into this problem once before. There was an entry in one > >>>> of the /etc/pam.d files that was causing me grief. Don't > >>>> remember what it was. dmesg might have some clues as to what pam > >>>> module(s) is/are not allowing the authentication to go through. > >>>> Have you tried su'ing to root and running synaptic-pkexec? > >>> > >>> That also fails as root can't open a display. > >>> > >>>> Cheers, > >>>> Mark > >>> > >>> Backatcha :) > >>> > >>> Cheers, Gene Heskett > >> > >> What happens if you try to run startx logged in as root? > >> > >> Mark > > > > This has been a std denial for 3 or 4 years. Its not possible for > > another user to use YOUR x screen. Security thing I guess. There > > used to be a work-a-round, but I used it so rarely I've now > > forgotten it (oldtimers), and so has everyone else, if it still > > works, its wearing a top secret label. > > > > The pkexec thing used by some utils, like synaptic, seems to open > > the synaptic gui as you, but the underlying apt runs as root or > > sudo. On the armhf versions it won't work unless you set a root pw, > > which the raspian build does not have by default. Only sudo, which > > is rejected by pam-auth-----. The net effect is that we have no > > gui-like package manager unless possibly aptitude might run. Having > > had to re-install, losing everything unless the re-install was on a > > new disk, saving the old one, 3 times now after aptitude screwed the > > pooch and destroyed my system, the chances of me running that on the > > r-pi are somewhere between point triple ought excrement and none. > > > > So, what I intend to do once an orange-pi 3 arrives (its instate A/O > > last night) is to use the r-pi to run linuxcnc, exporting its x > > stuff to the O-pi, for rendering, which the O-Pi claims to be able > > to do 30 FPS in 4k hdmi output, severe overkill for this. And it > > will still fit on the inside of the lid of the motor drivers box, > > getting rid of 20 lbs and nearly a cubic foot of a Dell Dimension > > X86 box, and giving me an additional 48 gpio's to play with as the > > r-pi talks spi at about 4 or 5 megabits to this I/O card, a Mesa > > 7i90HD. > > > > Thats the plan anyway. I am still in the process of hooking the card > > up to make the motors spin. > > > > Cheers, Gene Heskett > > I meant logging in as root, then running startx from the command line. > Not su'ing or sudo'ing. Just to see of X actually starts under a root > shell. > > > Mark raspian has a /root directory, but no passwd. Its and empty dir on the r-pi: gene@raspberrypi:/etc $ ls /root ls: cannot open directory /root: Permission denied gene@raspberrypi:/etc $ sudo ls -l /root total 0 gene@raspberrypi:/etc $ sudo ls -l /root/ total 0 Everything is done by sudo, after adding me to the sudoers file, while logged in as first user, pi. But I've not done anything else as user pi, so /home/pi is nearly empty:
gene@raspberrypi:/etc $ sudo ls -lR /home/pi /home/pi: total 4 drwxr-xr-x 3 pi pi 4096 Oct 30 19:30 linuxcnc /home/pi/linuxcnc: total 4 drwxr-xr-x 2 pi pi 4096 Oct 30 19:30 r_pi_ncfiles /home/pi/linuxcnc/r_pi_ncfiles: total 0 My home dir on the r-pi has it all, including a mount of a directory on this machine for the R-Pi_nc_files, which is a copy of the nc_files from TLM. After I dress and vote, I'll finish up making the vfd run, then concentrate on converting the 3 axis mill file to a 2 axis lathe setup before I wired up the stepper drivers. But I'll need to add a scale module to convert the speed to something the vfd can use easier. Right now, an s1000m3 gets me about a 70% pwm output, way above the vfd's set limit of 150Hz. Based on the assumption that 40 yo Century motors will probably self destruct if I spin them more than 4500. Even at that speed the cooling fan is a fire siren. What I wish is that the 7i90 had an a/d, so I could use the vfd's fout, but the encoder will have to do. I have a bit of machining to do on the 3 A667's holder yet, but where I am doing this is 20 feet from the lathe. Direct tests not practical until I move it and hook it up. But I can put a psu and scope on it and test it with the old spindle motor. I will probably use some nears to tell me when to switch belt positions, with an eventual eye toward doing that just like a tool changer. I've some motors I could rig to do that, loosen the belt, run the motor at 20Hz and use a derailier like mechanism to move the belt. Neat idea at least. No idea if I could make it 100% dependable. But it would sure beat me getting down on a knee to reach it, and then back up when its been shifted. With my back, that can be a problem. That will get done in the next couple days I expect. > ---------------------------------------------------------------------- >-------- Developer Access Program for Intel Xeon Phi Processors > Access to Intel Xeon Phi processor-based developer platforms. > With one year of Intel Parallel Studio XE. > Training and support from Colfax. > Order your platform today. http://sdm.link/xeonphi > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today. http://sdm.link/xeonphi _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
