Raspberry Pi Forums

GTR2Fan

arun.dh93 wrote:Given that cmdline.txt is not a part of the NOOBS installation how do you go about it?

Re-read answer #2.

GTR2Fan

@bob0711: Apart from forgetting to capitalise the first letter and accidentally missing out the word "would" in one place, paddyg's English is absolutely fine. Maybe if you'd been taught English at school rather than something masquerading as English, you might have understood him better.

GTR2Fan

I was referring to a USB port on another separate device as that's what the OP seemed to be inferring with...

I connected 5V from a USB to Pin 2 and GND to pin 6 for Model B RPi.

GTR2Fan

In my opinion the power design of the pi is entirely flawed from several angles. In what way? It relies on being fed a supply voltage that lies within the limits specified for USB 2.0 compliancy (5V +/-0.25V). The fact that many USB PSUs and chargers rated at or above the Pi's current requirements ...

GTR2Fan

Glad the video side is sorted. :) Did we have an 'hdmi_drive=2' entry in there? If so, try changing it to 'hdmi_drive=1'. If that fails then you'll need to read through the links the other guys gave as I think they go into more detail on what else might need tweaking. I'm confused as to whether a se...

GTR2Fan

I wouldn't follow that schematic if I were you. Directly connecting the base-emitter junction of a bipolar transistor between a GPIO output pin and ground looks like a fairly foolish thing to be doing in my opinion. I'm happy to be corrected if wrong.

GTR2Fan

http://www.themagpi.com/issues/

Click on the cover pages to go to free PDF download links.

GTR2Fan

If either of them are going to pull more than 16mA from a GPIO pin then you're risking damaging or killing your Pi. Don't connect either unless you know what you're doing.

GTR2Fan

Purely a guess here re the screen blanking problem, but I'm wondering if the Pi would be happier running the monitor at a 60Hz refresh rate instead of 75Hz. The monitor in question should support both. You could try changing 'hdmi_mode=18' to 'hdmi_mode=16' in your config.txt file to see if it fixes...

GTR2Fan

safetydevice wrote:I am interested in powering through GPIO so if anybody did it successfully, please post how.

I've nothing to add other than that the method you used does work. I can't imagine why it didn't work for you unless you were trying to power it directly from a USB port that couldn't supply enough current.

GTR2Fan

j1000 wrote:Is overclocking through raspbmc not advised?

It's probably fine. It's just that something I've installed at one time or another has blown my warranty bit which I didn't find out until some time later, so I prefer to overclock manually so I know what's actually being changed.

GTR2Fan

The version of RaspBMC from here is an image file and needs placing on the card with Win32DiskImager to work, the version from the RaspBMC website just needs copying across to the card then runs its own custom installer. Overclocking via the in-app menu should be OK as far as your warranty goes, but...

GTR2Fan

Fish and chips? Make me jealous why don't you!

GTR2Fan

If this is the VGA monitor we configured very recently, I think my settings send the sound via the HDMI-VGA converter, so your audio interconnecting lead probably needs to go from the 'audio out' on the converter (assuming it has one) to the monitor.

GTR2Fan

Wanted to try and install onto usb 8GB flash drive as heard make raspbmc faster. Putting it onto a USB stick probably won't make much difference. The easiest way to make RaspBMC feel more snappy is to overclock your Pi. There are options in the dedicated RaspBMC Settings program to do just that. ht...

GTR2Fan

It's a mains-powered 3.5" caddy, so no need for a powered USB hub. The internal power supply board is capable of delivering 1.5A at 5V though, and the drive that's in it only takes around 250mA from the 5V rail, so the plan is to do away with the separate Pi power supply and power it from the caddy'...

GTR2Fan

I've gone uber-skinflint on mine and use an old unrated Sandisk 1GB microSD card to boot from that's too small/slow to be of much use for anything else. The OSes live on a USB-HDD that used to spend most of its life switched off and doing nothing as it was originally used just for backups. It may be...

GTR2Fan

Are we there yet?

GTR2Fan

Also, a Pi wouldn't be able to provide the necessary power from its USB port to drive amplifiers capable of driving loudspeakers directly with any real volume, so you'd have to run the USB sound card from a powered USB hub. As above, powered speakers would be the simplest answer.

GTR2Fan

rasprm3 wrote:How do I restart the Pi?

Code: Select all

sync
sudo reboot

And how do I restart the OS after the Pi restarts?

OS behaviour on start-up will be the same as it was before updating/upgrading.

GTR2Fan

Code: Select all

uname -r

...gives...

Code: Select all

3.10.26+

...and is easy and fast to type.

GTR2Fan

Nice find! And to think that some people still have the cheek to complain about the Pi being a rip-off because of the vast sums of money you have to spend on the leads that aren't included.

GTR2Fan

That's according to the 'auto-fill' data for the device which is often woefully inaccurate on eBay. I nearly got caught out by that a number of times when selling stuff regularly on eBay so gave up on it and manually filled in everything to make sure that they weren't describing my items for sale as...

GTR2Fan

You could try rotating the camera through 180° and see if the defocussed areas also rotate by 180°. That would tell you whether it's dust/dirt on the lens/sensor, or whether something odd was going on in software... maybe.

GTR2Fan

Excellent! Glad it's sorted!

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