On Tuesday 08 November 2016 11:46:38 Chris Albertson wrote: > I think you've got it. If the supply is lower spec than 2.5 A at 5.1 > V then I'd upgrade the power supply. Add more current to the > supply if your USB devices are USB bus powered > > The power supplies that people try to use are not "bad". it is just > that most are designed to charge a cell phone battery, not power a > computer > > I use either the Pi with very little plugged into it or for bench > setups an old PC supply that is over 20A for the 5V > > But I think the root of Gene's problems is he is attempting to learn > everything all at once.
Bingo! > Better to use the Pi for a while, learn how > to best use it for simple things, use the Mesa board and then later > integrate parts you are very foamier with. Atm, its running beautifully on the G0704's tv screen monitor. As a mill. So we make the vfd behave since it and the motor are currently on the same table and handy, THEN make the mill config into a lathe config, hook the 2 stepper drivers to steppe.0 and stepper.1, then take the box to the lathe & get it hung. But to do that, I'll need to cut up and make the overhead frame, out of 1.5" square tubing, that will hold the box, monitor and a 4 foot led shop lamp, as high as I can get it and the garage door still clears to open. So I'm returning to my JOAT days here. :) Please bear with me. But now my hair is dry from taking a much needed shower, and round up the missus and go vote. That will likely involve breakfast at Kathy's before I can get back to this. Who knows, maybe the orange-pi 3 will be in the mailbox when we get back, it is going to do the x rendering in this contraption. (I hope) > Even little things like how to do a backup of an embedded computer. I did get a backup of sorts last night with amanda, but obviously I'll need to fine tune that. But here's the relevant lines from that log: STRANGE DUMP DETAILS: /-- raspberrypi.coyote.den / lev 0 STRANGE sendbackup: start [raspberrypi.coyote.den:/ level 0] sendbackup: info BACKUP=/bin/tar sendbackup: info RECOVER_CMD=/bin/gzip -dc |/bin/tar -xpGf - ... sendbackup: info COMPRESS_SUFFIX=.gz sendbackup: info end ? /bin/tar: ./boot: directory is on a different filesystem; not dumped ? /bin/tar: ./dev: directory is on a different filesystem; not dumped ? /bin/tar: ./proc: directory is on a different filesystem; not dumped ? /bin/tar: ./sys: directory is on a different filesystem; not dumped | Total bytes written: 5722931200 (5.4GiB, 2.1MiB/s) sendbackup: size 5588800 sendbackup: end and: raspber / 0 5458 3388 62.1 44:12 1308.1 0:29 119615.1 raspber /boot 0 27 19 72.0 0:11 1771.1 0:00 196260.0 the first 0 is backup level=a full, the next 2 are data in megabytes, and data in megabytes after compression by gzip. I can squash those errors shown with an excludes file but I'll have to invent 2 more profiles, each referencing its own excludes file. AH&E work at the keyboard. :) But, its getting to the virtual tapes, which is what counts. > Try doing a few restores from the backup. You find it works different > from a larger desktop PC then a embedded device. Need time to test > and measure network performance and so on also on. ..THEN put it all > togther Or put it all together and then make it work... :) > On Mon, Nov 7, 2016 at 1:35 AM, W. Martinjak <mats...@play-pla.net> wrote: > > Gene, > > > > the symptoms point to a power supply problem. > > It's the "famous" brown out problem, due to bad designed power > > supplies. Sometimes it's the cable of the supply with excessive > > voltage drop. Yes this is unfortunatly the price of getting cheaper > > and cheaper.... And I assume, that the hdmi connection pulls more > > amps then expected because the hdmi2dvi conversion. I had similar > > effects with a bad hdmi cable. > > One further negative impact of this brownouts is a degenerating > > filesystem. > > > > A 1st discharge is a active usb hub for the keyboard, > > and should this not be sufficient then use a better/stronger power > > supply. > > > > Matsche > > > > On 2016-11-07 02:21, Gene Heskett wrote: > >> On Sunday 06 November 2016 16:28:38 Chris Albertson wrote: > >>> Don't under estimate the power of simply exporting X11. As an > >>> example a very small amount of data goes over the network that > >>> might say "move that window 75 pixels to the left" and then the > >>> x-server has to change the value of 350,000 pixels and maybe > >>> remember the values of the ones covered restore the values of the > >>> ones uncovered. It is MUCH better then sending raster graphics > >>> over the net. It also moves calculations of about clipping and > >>> renders vector graphics to rater all onto the server If using > >>> openGL al lot of complex matrix math can be pushed off to the > >>> computer with the physical display. > >> > >> Well, after today I am ready to rip it back out and go back to an > >> x86 based system. > >> > >> 1. much more so on its own console, but occasionally from here, the > >> keyboard either goes dead for some random amount of time, which I > >> think might be related to mouse pointer position AND somewhere its > >> set for focus follows mouse. Its better from this keyboard than any > >> keyboard attached to it because I don't think the mouse pointer > >> position counts. > >> > >> 2. after setting a root pw so synaptic might work, things are so > >> screwed I'm tired of beating my head and back up over it. > >> > >> 3. After trying a 2nd brand new keyboard and mouse and getting the > >> same results, much worse with x installed, I am convinced that the > >> armhf version of xkb is one busted piece of S---. I just spent much > >> of an hour trying to add 9 lines to the halfile to enable 3 outputs > >> to control the vfd, and failed. > >> > >> At the moment I cannot login from here because I was dumb enough to > >> tell raspi-config to wait for a login before starting the network. > >> And because of the poor keyboard response, its impossible to type > >> my user pw because it will either skip characters, or go wild > >> because it missed a key-up event, and despite setting the repeat > >> for slow and slower, it will go off and put 50 characters of the > >> last key pressed into whatever I an editing before I can react and > >> tap a different key. Continueing at 50 chars a second until I hit > >> another key. Then if I try to backspace over the extra characters, > >> like as not the backspace key will hang and erase not only what I > >> was typing, but 4 or 5 lines of a hal file that was already there. > >> > >> Anyway, its essentially bricked now until the sd card is re-imaged. > >> And I had just added it to amanda's nightly backup duties early > >> this morning, so the backup is no good either since the first one > >> won't be, no network. > >> > >> I might be able to work around it IF the term was terminal-4.8, but > >> its not. I've tried every terminal in the menu's, and none of them > >> are big enough to be usefull as a default, and none have a resize > >> drag border or corner, I tried all 3. Postcard sized doesn't cut > >> it. > >> So, one question, will the udoo service the 7i90HD over an SPI > >> connection? If it will, I might blow another $150 trying it. The > >> extra 60 is like doing an engine swap, where 50 years ago it was a > >> given that you bring the engine, and the adapter kit, the torch > >> with full bottles, and $500 (in 1955 money) for the other stuff it > >> takes to make it all work. BTDT, several times. > >> > >>> About the cable. Just don't worry about oil. oil does not > >>> conduct. > >> > >> I know that, but I have had hand lotion destroy microphone cables. > >> Litterally dissolveing the usual grey vinyl jacket in 6 months of > >> news talent putting on the news at WDTV. > >> > >>> Remember many larger size transformers live in an oil bath. > >>> Flooding them with oil keeps the water out. > >> > >> I know that too haveing soaked my arms in the askarol or whatever > >> pcb was in them, repairing burned up connections 18" under the > >> oil's surface, once in a 250 kw rated box, probably north of 10,000 > >> lbs. 3 times in my broadcasting career. You shower daily, and you > >> still stink for about a month afterwards. I started my youngest > >> while I still had some of the smell on me. Getting him, born deaf > >> and on predigested formula for the 1st 5 years, up to his teen > >> years took quite an effort. Now at about 40, he eats what he wants, > >> and much to the surprise of the docs at the Mayo Clinic, he now > >> hears at least as well as I do. I will always connect the dots on > >> him getting started, and me being contaminated with that crap. > >> > >>> It is only the wire insolation > >>> might care or not about oil. > >> > >> This wire is stranded, so no varnish. Lose the vinyl and its toast. > >> > >> So I'll not putz with this, but work on the hardware until the > >> orangepi gets here. I'll redo the u-sd without x, and see if I can > >> ship the x stuff to the Orange-Pi-3 for rendering. > >> > >> At that point I'll need a fresh recipe for building the u-sd > >> card(s), I still have 2 virgin 32GB cards in the blisterpack. > >> [...] > >> > >> Thanks Chris. > >> > >> Cheers, Gene Heskett > > > > -- > > "In der Wissenschaft siegt nie eine neue Theorie, > > nur ihre Gegner sterben nach und nach" > > > > Max Planck > > > > > > -------------------------------------------------------------------- > >---------- 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
