Category Archives: Nerdy Mind

Raspian, Raspberry Pi Vivaldi browser

so your getting
/usr/bin/vivaldi: error while loading shared libraries: cannot open shared object file: no such file or directory

hmm, try

sudo cp /usr/lib/arm-linux-gnueabihf/ /lib/

While typing that line you might want to press TAB before the .60 in case your version is different?

ok, vivaldi should run now.

Regardless basically you want to copy the chromium provided to /lib/

Let me know if you have any problems and indeed how you fixed it if this did not work for you.


Windows 10 December 2017 update, Caps lock, Num Lock Keyboard LED Lights not working FIX

So you got the Windows 10 update of December 2017 and now your keyboard num lock, caps lock and scroll lock lights (LED) no longer work.

Check windows version as this fix worked for me on this version

open a command prompt by typing ‘cmd’ into the search bar then enter


you should see something like

IF your version is even close this should work fine.

Open Device Manager, and goto ‘Universal Serial Bus controllers’. Start removing ‘USB Root Hub’ devices until your keyboard stops working.

Give it a few seconds, then restart your computer.

All Done. Enjoy


Undervolt explained, Overclocking voltage.

Undervolting, or undervolt means using a lower voltage during over clocking.


All modern IC use a fixed voltage to do their work. If they need to do more work they draw more current at the same volts.

1.2v and no work = 1.2v
1.2v and working hard = 1.2v

Each of the above assumes infinite current.

The over clocking voltage dilemma starts.

A CPU is rated at a meridian voltage based around a minimum and maximum safe voltage.

As reactive loads they do not conform to R=V/I in the sense of a simple resistance. The apparent resistance is reactive to need, not voltage. CPU’s are programmed to know the voltage for a given frequency given infinite current.

More, CPU IC’s are not voltage regulators. Raise the voltage and the same frequency CPU will just dissipate, in heat, the excess. Your CPU will get hot. Try it. Up your voltage but not your clocks.

So, here we are. What is the correct voltage?

Specification of the CPU put it clearly at 4.2Ghz 1.4250v

Manufacture error?

3.9Ghz 1.3850v +_ 10% = 4.2Ghz ~1.4040v


AMD RADEON R7 360 safe overclock.

The AMD RADEON R7 360 comes in many forms. There is no official reference.

Pretty standard form:
GPU clock: 1000Mhz
RAM clock: 6400Mhz

So let us see what is out there.

Gigabyte GV-R736OC-2GD
GPU clock: 1200Mhz
RAM clock: 6500Mhz

All good, now, we will take ASUS AMD R7 360 as an example, as they have 2 revisions of the same model.

ASUS R7360-OC-2GD5
GPU clock: 1070Mhz
RAM clock: 6500Mhz

R2: (R2 must be better right?)
ASUS R7360-OC-2GD5-V2
GPU clock: 1070Mhz – 1090MhzOC
RAM clock: 6000Mhz – 6020MhzOC

What happened to the RAM clock on the R2?


We can see some manufacturers feel confident supplying 1200Mhz GPU’s, and 6500Mhz RAM using the same parts.

Checking the ASUS GPU Tweak tool I could take the RAM to 7500Mhz and GPU to 1250Mhz on a R2 card.

Looks like the R2 card was made so the tweak tool could have more perceived impact. Or with the R1 card over clocking was much more dangerous and needed headroom?

OK, on to the safe overclocking.

This GPU will run all day 1100Mhz 1.225V
Ram will run all day at 6200Mhz with stock cooler.

No voltage overclock needed and not beyond any specification of the GPU or RAM.

Always put power target at 110%. even at stock.

If you want to push it,
GPU 1150Mhz 1.255v
RAM 6400Mhz

Your temps will increase, depending on your card and cooler. Make sure the temps stay below 90C

Anyone with a stock 1200Mhz GPU clock card, please do let me know the GPU Voltage for addition and reference to this article.

Note the GDDR 5 RAM chips are rated at higher frequencies without voltage increase. Simply current and heat is the limit here.