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by Shadow_7
Mon Dec 05, 2016 2:43 pm
Forum: General discussion
Topic: Is there some sneaky trick to start faster?
Replies: 29
Views: 2844

Re: Is there some sneaky trick to start faster?

One trick for debian. sudo touch /bootstrap and reboot. It skips a lot of the boot stuffs. Although I'm not sure if that's applicable to raspbian or available since the switch to systemd. Or if it leaves you in a usable state as far as the OS goes, but it's fast. It gets removed at boot, so not pers...
by Shadow_7
Thu Oct 27, 2016 12:07 pm
Forum: General discussion
Topic: Configure wpa_supplicant
Replies: 10
Views: 3471

Re: Configure wpa_supplicant

Depending on how you do things. Using the nmtui cli interface for network-manager might be the easiest / simple-ist. Otherwise there's a few steps, some otherwise redundant but needed in quirky situations. # wpa_passphrase <ESSID> <PASSWORD> | tee wpa.conf That generates the credentials stuff for wp...
by Shadow_7
Sun Dec 20, 2015 6:37 am
Forum: Graphics, sound and multimedia
Topic: Xdmx Multihead system
Replies: 1
Views: 2247

Re: Xdmx Multihead system

You can test this locally without networking other machines with Xephyr (or the older Xnest). Which works fine for me on my hp stream 11 to divide a 1920x1080 display into a 3x1 grid of 640x1080 screens. Which gives me an xterm of 80 characters by 405 lines when I stack the divisions vertically usin...
by Shadow_7
Mon Dec 14, 2015 9:13 am
Forum: Raspbian
Topic: How do I stop the GUI automatically starting
Replies: 19
Views: 15006

Re: How do I stop the GUI automatically starting

The more official way (at least in debian) is to populate this file with "false". /etc/X11/default-display-manager Although uninstalling a display manager works too. As previously mentioned. But then you install something that grabs a display manager and installs it as a dependency. Like many of the...
by Shadow_7
Wed Jul 22, 2015 7:32 pm
Forum: General discussion
Topic: Raspberry pi wpa_supplicant
Replies: 5
Views: 569

Re: Raspberry pi wpa_supplicant

You can create the file.

wpa_passphrase ESSID PASSWORD > wpa_supplicant.conf

I don't know about any default conf as the pi doesn't come with a built in wifi device. But I could be wrong. If you're connecting to an open or WEP network you don't even need wpa_supplicant.
by Shadow_7
Wed Apr 22, 2015 9:11 pm
Forum: General discussion
Topic: Keyboard confusion
Replies: 4
Views: 432

Re: Keyboard confusion

Raspbian defaults to a UK setting for the keyboard. # is the L for pound, and | (pipe) is not pipe.

$ sudo dpkg-reconfigure keyboard-configuration

(if you're using raspbian ofc)
by Shadow_7
Tue Apr 21, 2015 8:28 pm
Forum: General discussion
Topic: Get radio tuner frequency
Replies: 5
Views: 744

Re: Get radio tuner frequency

There are SDR options these days. As in Software Defined Radio. And GRC lets you fiddle with a few of these SDR devices. As in Gnu Radio Companion. These devices are not necessarily limited to just the AM/FM bands. They can be as cheap as $20 or as much as $700+. And some can transmit if you want to...
by Shadow_7
Thu Apr 09, 2015 11:50 pm
Forum: Raspbian
Topic: How do I unzip files I've downloaded within the raspberry pi
Replies: 5
Views: 16629

Re: How do I unzip files I've downloaded within the raspberr

$ sudo apt-get install p7zip-full
$ 7z x <file>.zip

Is one way.
by Shadow_7
Tue Feb 10, 2015 11:28 pm
Forum: General discussion
Topic: The Raspberry Pi 2 Q&A thread
Replies: 442
Views: 77151

Re: The Raspberry Pi 2 Q&A thread

Any pointers to how to compile for older core on PI2? When I compiled fbdev and povray on debian armel (armv4) for a model B, I used the following CFLAGS. CFLAGS="-Ofast -march=armv6zk -mfpu=vfp -mfloat-abi=hard -mtune=arm610" I'm not sure if that helps, but raspbian at the time was too frustrating...
by Shadow_7
Sun Feb 08, 2015 6:28 pm
Forum: General discussion
Topic: The Raspberry Pi 2 Q&A thread
Replies: 442
Views: 77151

Re: The Raspberry Pi 2 Q&A thread

Pi + power hungry WiFi stick + ??? probably needs over 1A, and the price differential between 1A and 2A is minimal, so why take a chance? Availability! 2A plugs off the shelf are still a rare, or an out of stock at best item. More so in quantity if you have more than one device to power. Where the ...
by Shadow_7
Sun Feb 08, 2015 4:09 am
Forum: General discussion
Topic: The Raspberry Pi 2 Q&A thread
Replies: 442
Views: 77151

Re: The Raspberry Pi 2 Q&A thread

Power? There seems to be no official power (mA) rating for the pi 2. Is it safe to assume that the 700mA minimum still applies? Do I need to upgrade my powered USB plug from 1A to 2A? Various unofficial benchmarks suggest that the B (not B+) uses more power than the pi 2 under load. And all the pi's...
by Shadow_7
Wed Feb 04, 2015 8:56 am
Forum: General discussion
Topic: The element of surprise
Replies: 48
Views: 2681

Re: The element of surprise

Perhaps the announcement came early because of the Odroid C1.
by Shadow_7
Fri Jan 30, 2015 8:26 pm
Forum: Raspbian
Topic: Pi reboots on shutdown
Replies: 9
Views: 946

Re: Pi reboots on shutdown

$ sudo shutdown -h -P now The -P is power off, the -h is halt, and the now is immediately. On older x86 machines the -P is needed for quirky bioses, although I don't know if it has any application for arm architectures. Have you tried rpi-update after installing raspbian? There might be firmware cha...
by Shadow_7
Sat Jan 17, 2015 10:41 am
Forum: Off topic discussion
Topic: AS regards some of the novice questions we're getting....
Replies: 25
Views: 1992

Re: AS regards some of the novice questions we're getting...

I can't say I remember any of that. I started on a vic 20 at ten, but my dad was kind of cheap. He finally upgraded from an 8088 to 486 in '94 about a month before I left for the Army. I spent most of my teens on a 300 baud modem with various bbs's that you called phone to phone style (64 kilobytes ...
by Shadow_7
Sat Jan 10, 2015 4:04 am
Forum: Other
Topic: kali: startx goes to blank screen
Replies: 4
Views: 5723

Re: kali: startx goes to blank screen

I'm not sure how to solve it, but startx uses the .xinitrc file to determine what window manager to use. Depending on your configuration it might not assume :0 as the display on subsequent boots, but you can pass that to startx and otherwise override it. When I don't override it and start X from "ot...
by Shadow_7
Sun Aug 31, 2014 12:47 pm
Forum: Beginners
Topic: How do I connect Raspberry Pi to a monitor with VGA?
Replies: 19
Views: 1479

Re: How do I connect Raspberry Pi to a monitor with VGA?

Go to http://elinux.org/RPi_VerifiedPeripherals#Display_adapters and read the sections "HDMI ->VGA Cables" and "HDMI->VGA converter boxes". That's a very short list for known HDMI -> VGA. And apparently one cannot search hdmi or vga on this forum because it's too common a term. http://plugable.com/...
by Shadow_7
Sun Jul 27, 2014 3:37 am
Forum: General discussion
Topic: Battery Sled for pi?
Replies: 2
Views: 451

Battery Sled for pi?

I've seen a lot of cradles and adapters for batteries to power devices like external monitors, camcorders, and the like. Is there any existing sled that you can feed standard OTS batteries (AA or similar) to power a raspberry pi for any duration. Like if you went camping or something? Or traveled a ...
by Shadow_7
Sun Jul 27, 2014 3:24 am
Forum: Beginners
Topic: How to stop totally given MonitorShutdown in Raspbian ?
Replies: 10
Views: 1380

Re: How to stop totally given MonitorShutdown in Raspbian ?

In the /etc/X11/xorg.conf, you can set the ---option "DPMS" "off"--- in a section of the config. You don't need every section of a xorg.conf like the old days for most distros. Once setup it should persist with each boot. Versus having to remember and rerun commands every time the power blinks or yo...
by Shadow_7
Tue Jul 15, 2014 3:15 pm
Forum: General discussion
Topic: How to label those tiny micro sd cards?
Replies: 23
Views: 9074

Re: How to label those tiny micro sd cards?

If you don't mind having the label dangle off of the card. You can scotch tape a paper label to the card. And double over the tape on the backside for a kind of laminate configuration. With scissors to trim any sticky overlap. With a printer and a little graphic design you can print the tag and have...
by Shadow_7
Tue Jul 15, 2014 1:53 pm
Forum: Debian
Topic: Debian 7.4 .img for SD card
Replies: 12
Views: 3854

Re: Debian 7.4 .img for SD card

You can debootstrap a debian install from raspbian. But you'll have to use the armel flavor which is optimized for arm v4. The armhf one is optimized for arm v7 which has opcodes not available on the pi. Slap on a kernel from raspbian or custom compiled. And the fbturbo X driver from sources(no pack...
by Shadow_7
Mon Jul 14, 2014 5:45 pm
Forum: Advanced users
Topic: Graphic drivers
Replies: 13
Views: 3330

Re: Graphic drivers

I went with debian / jessie (armel) so I could have OpenGL support. As in glxgears and glxinfo does stuff beyond outputting text messages. But it's not accelerated, purely software rendered which is about 11 fps (windowed) for glxgears on a good day. The fbturbo xorg driver gives framebuffer acceler...
by Shadow_7
Mon Jul 14, 2014 12:29 pm
Forum: C/C++
Topic: Which language to use?
Replies: 32
Views: 57274

Re: Which language to use?

Assembler does fall short when you throw an operating system into the mix. Various protect modes and stuff can make it slower than a C program which can be adjusted by the compiler to play well with the destination environment. Assembler is still a useful option, as a two pass compile is fast. And t...
by Shadow_7
Sun Jul 13, 2014 2:26 pm
Forum: C/C++
Topic: Which language to use?
Replies: 32
Views: 57274

Re: Which language to use?

I've always liked assembler, but it is platform specific. And not a skill listed in most job ads. But it has it's perks, compile time, execution time, and resulting binary size are as good as it gets. I would say C personally. It's one of the few that you could write, shove in a drawer for twenty ye...
by Shadow_7
Sat Jul 12, 2014 3:58 pm
Forum: General discussion
Topic: Raspberry Pi laptop
Replies: 6
Views: 1386

Re: Raspberry Pi laptop

I've often thought of this type of thing myself. It's not cost effective, until you factor in that upgrading it is the cost of the next generation pi like board. And if one thing breaks, you replace that one thing, not the whole thing. Coffee in the keyboard, repair costs $15. Also factor in somethi...
by Shadow_7
Sat Jul 12, 2014 2:31 pm
Forum: General discussion
Topic: STICKY: Introduce yourself!
Replies: 3230
Views: 555604

Re: Introduce yourself!

James from Texas (this decade anyway). I've wanted a low power arm device for a while. And got tired of waiting for the next generation to be good enough to replace my aging desktop AND be OTS purchase-able. I don't do financial things online, and most of the news in the past half decade has only ve...

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