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. 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. Even little things like how to do a backup of an embedded computer. 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 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 -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ 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
