I have a laptop and I use an extra USB cable keyboard for it but its lights don't work in ubuntu system, my laptop's keyboard doesn't have a light function so I use an extra keyboard but it doesn't work lights either
I am in the terminal
xset -led 3 xset led 3
I tried the command, it worked once at first, but after turning on my laptop, these commands didn't help either
Related
I have a wired keyboard (Drop Ctrl) plugged into a port on my Macbook Pro, and it's working. Both the keyboard and the laptop require USB-C, so my cable is USB-C-->USB-2 with a USB2-->USB-C adapter. (It might be USB-3 instead of 2, I'm not sure). At any rate, the cable+adapter combo works.
I bought an Apple USB-C to USB-C cable, and it doesn't work. The keyboard doesn't seem to get any power.
I've tried the Apple cable on all USB-C laptop ports, still doesn't work. I went from laptop to Pixel phone using the same Apple cable and it charges the phone. So I'm scratching my head. What am I missing?
It turns out that the keyboard won't work with USB-C 3, only USB-C 2. I hope this helps someone else.
Two things I have found with macbooks.
my power block will stop charging my power book until I unplug it and plug it back in. It is pluggeding into a power bar so I don't see why any internal protection circuit should be tripped.
my childs macbook air would not power up. She was leaving it on her bed covers thus blocking the vents and overheating. Once I put it on a hard surface it started to charge and power up. It appears the system would not charge while the air vents where blocked.. I am guessing that charging causes heat and it would trip the sensor stoping charging.
I am using Beaglebone black Rev C with Debian OS.I have flashed eMMC using sdcard.
I am facing the issue that whenever I remove SD card and boot the board , it boots successfully first time but after next reboot cursor continuously blinking on screen and nothing is happening further.
Please help me now how to resolve it.
I got some brand new banana Pi's,
these are the "Banana Pi-M2" and the "Banana Pi-M3"
I was trying to install Debian on both of them, but I couldn't get it to work.
I was exactly following this tutorial here (Windows):
http://wiki.lemaker.org/BananaPro/Pi:SD_card_installation
to save Debian on the SD Card.
The Problem is always the same. When pressing the power Button on the "M3", or plugging in the "M2", only the red LED goes on and nothing happens.
The LED for the LAN port stays off, so it comes close that the Pi is not booting up.
The power supply I am using produces 5V and 2100mA which should fit the conditions for the Banana Pi.
The distros I then tried to install were for example Bananian which I got from here:
https://www.bananian.org/download
And several distros like Debian from here:
http://www.banana-pi.org/m3-download.html
http://www.banana-pi.org/m2-download.html
I tested it using 2 different SD Cards, and also only using a USB Stick.
everything was producing the same error.
Is there something I missed?
Thanks in advance.
It sounds like an underpowering situation.
If you have a barrel jack instead of micro usb use the barrel jack.
The pre-production samples of this board had the usual 4.0/1.7mm barrel jack for DC-IN BPi M2/M2+ also use. This has been replaced by a Micro USB jack on the first production batch in Dec 2015 leading to the usual sorts of problems banana-pi.org forums are full of (see also next paragraph for some reasons). Starting in May 2016 Micro USB has been replaced by the 4.0/1.7mm barrel jack again so powering is possible more reliable now. The Micro USB receptacle on the longer board side is USB OTG, also connected to the board's PMIC and while looking like an alternative way to power the board that's not recommended unless you love underpowering situations, reboot loops and the like.
I had the same problems at one point, like #Hagen said, it could be under powered, make sure you have a 5V, 2A rated power supply. The other cause of the red led and no boot is the lack of a micro SD card. Try pushing it in a bit further though not with much force and hit reboot. if you get 3 leds, it works!
This Banana PI M3 device starts up and works normally when power supply connector (4mm/1,7mm) and a micro USB connect put to device of Banana same time from same 5V power supply. I think in the device may have something grounding problems.
I have an embedded linux board with a max3222e RS232 converter. The pins are availlable on soldering pins. I think I've figured out the ground pin, the TX pin and the RX pin. When I connect my pc with a terminal program, I can see the boot logs of the embedde linux system. Also I can stop u-boot with pressing any key. But when I try to use some boot arguments then the characters of the pressed key are not the same like on the pc. For example:
Enter->y
a -> 0
s -> F
Can anybody tell me what's wrong. The serial settings are 115200 Baut 8N1 and no Flowcontrol.
Thanks a lot
Karl-Heinz
What terminal you use ? I use minicom. I have set
`NO PROGRAMING FLOW CONTROL,'
`YES DEVICE FLOW CONTROL`.
And u-boot char is send good.
You try other terminal for example putty for windows ?
I am a newbie in Beaglebone Black, I install Ubuntu on my Beaglebone Black which works fine, Now I am trying to install Angstrom on Beaglebone Black, for this I first of all download image of Angstrom "Angstrom-Cloud9-IDE-GNOME-eglibc-ipk-v2012.12-beaglebone-2013.08.21.img" , then extract it using "7Zip" , after that I use "Win32 Disk Imager" to copy it into a 16 GB SD card.Now insert my SD card in Beaglebone Black. Then I press boot button and after that I provide power supply using 5v and 1 Amp adapter. After making sure that all four LED's are glowing , I release boot button.
Now the problem is the installation should be completed in around 45 minute and all four LED's should become stable , but in my case LED's keeps blinking. I check it more than four times for around more than one and a half hour and after that I take out the power supply and check Beaglebone Board on my desktop monitor, surprisingly Ubuntu is Still there.So, please tell where is the problem.
Use this file "BBB-eMMC-flasher-2013.09.04" under BeagleBone Black (eMMC flasher) for flashing to eMMC
I had also installed Angstrom on BeagleBoard Black.
You should follow derek molloy tutorial. Here is the link to tutorial
It should boot up in 10 seconds. It will not take 45 minute to boot up if properly installed.