Go to advanced search

by obcd
Thu Apr 25, 2013 10:35 am
Forum: Troubleshooting
Topic: SD Card is working fine in Pi but in nothing else!
Replies: 37
Views: 20761

Re: SD Card is working fine in Pi but in nothing else!

Aren't most preconfigured cards 4Gig or 8Gig.
As it's a 32 Gig, he should have imaged it himself or have it done by someone else.
by obcd
Thu Apr 25, 2013 8:40 am
Forum: Troubleshooting
Topic: Cannot SSH to pi via WiFi
Replies: 19
Views: 7153

Re: Cannot SSH to pi via WiFi

What is ifconfig showing you for the wifi adapter?
What is the error you are getting when you try to ssh to the pi?
Can you ping the pi properly from another pc?
Have you experimented with iptables or other firewall settings?
by obcd
Thu Apr 25, 2013 8:28 am
Forum: Troubleshooting
Topic: SD Card is working fine in Pi but in nothing else!
Replies: 37
Views: 20761

Re: SD Card is working fine in Pi but in nothing else!

In order to change the sd card back to one large fat32 partition, you wil need a tool that can manipulate partitions. If you format a partition, it's size and type won't change. Windows has the partition manager tool for that. You need to be very carefull with those tools. If you choose the wrong dr...
by obcd
Wed Apr 24, 2013 1:06 pm
Forum: Troubleshooting
Topic: Trouble with multiple Raspberry Pi's
Replies: 10
Views: 1408

Re: Trouble with multiple Raspberry Pi's

He said he bought the 5 pi's together and 3 of them are giving problem.
So you think he got 2 older boards with a samsung ram and 3 newer ones with a hynix?
by obcd
Wed Apr 24, 2013 11:22 am
Forum: Troubleshooting
Topic: Trouble with multiple Raspberry Pi's
Replies: 10
Views: 1408

Re: Trouble with multiple Raspberry Pi's

Wouldn't that be kind of strange if the same sd cards and supplies work on his other pi's?
by obcd
Wed Apr 24, 2013 11:19 am
Forum: Troubleshooting
Topic: SD Card Corruption
Replies: 36
Views: 24786

Re: SD Card Corruption

I agree that the size of the sd card reported to the OS should stay consistent. But, shouldn't a low level format of the sd card make it usable again with a decrease in size? I read an article of a firm that developed a fail safe rootfs partition type for sd cards. They tested it out and also report...
by obcd
Wed Apr 24, 2013 9:29 am
Forum: Troubleshooting
Topic: My Raspberry pi won't boot
Replies: 3
Views: 644

Re: My Raspberry pi won't boot

Are you having a 12V power adapter with a micro usb connector as plug? This would suprise me. Is it something that came with other equipment or did you buy it specially for the Pi?
by obcd
Wed Apr 24, 2013 8:39 am
Forum: Troubleshooting
Topic: Raspberry Pi Won't Boot, Red Power Light Only
Replies: 197
Views: 419514

Re: Raspberry Pi Won't Boot, Red Power Light Only

A voltage regulator can also drop it's output voltage if it becomes 2 hot (thermal shutdown) or if the requested current is higher than what it can deliver (overcurrent protection). The second thing usually also triggers the first. The nearby capacitor might be hot because the heat is radiated troug...
by obcd
Wed Apr 24, 2013 8:27 am
Forum: Troubleshooting
Topic: SD Card Corruption
Replies: 36
Views: 24786

Re: SD Card Corruption

The limited number of write / rewrite cycles is not the cause of the corruption. If an sd card starts to fail due to wear out of the flash technology, it's own controller will mark the bad blocks so that they are no longer used, and the available size of the sd card will become smaller. Gumby has tr...
by obcd
Wed Apr 24, 2013 8:12 am
Forum: Troubleshooting
Topic: USB FIQ testing....
Replies: 181
Views: 72855

Re: USB FIQ testing....

thanks for the hard work.
Is it possible to get a short description of what needs to be done to obtain the stuff for testing, or does that exist somewhere and did I simply miss it?
by obcd
Tue Apr 23, 2013 9:35 am
Forum: Troubleshooting
Topic: SD card corruption, reboot ... Is My RPI defective ?
Replies: 3
Views: 746

Re: SD card corruption, reboot ... Is My RPI defective ?

The older Pi's had the usb polyfuses that limited the inrush current when a device was hotplugged to an usb port. They are removed on the newer pi's as they limited the current the usb ports could deliver so that some devices didn't work on them. Due to that, there is a short voltage dip on the 5V l...
by obcd
Mon Apr 22, 2013 6:18 am
Forum: Troubleshooting
Topic: SD Card Corruption
Replies: 36
Views: 24786

Re: SD Card Corruption

I assume you tried a setup with the partitions mounted read only in fstab as well? It's a pretty scary problem. Specially since no one seems to know why it affects some of us and not others. All possible causes are brought up like supply voltage, chinese usb devices, not properly shutting down, non ...
by obcd
Mon Apr 22, 2013 5:22 am
Forum: Troubleshooting
Topic: SD Card Corruption
Replies: 36
Views: 24786

Re: SD Card Corruption

Maybe you already did, but one other thing you could try is disabling the swapfile as well.
This should bring all writing close to none.
(Some files like resolv.conf are still updated once during boot.)
I assume you are aware that overclocking also can cause corruption.
by obcd
Sun Apr 21, 2013 5:36 pm
Forum: Troubleshooting
Topic: Simultaneous HDMI and Analog Video
Replies: 5
Views: 1233

Re: Simultaneous HDMI and Analog Video

To my knowledge, it isn't possible to use both video outputs at the same time..
by obcd
Sun Apr 21, 2013 9:10 am
Forum: Troubleshooting
Topic: Seems slow
Replies: 11
Views: 1467

Re: Seems slow

The Pi processor is an arm V5i core at 700Mhz. High end smartphones usually have an arm V6i and are sometimes dual core or even quad core. The graphical X system doesn't use hardware acceleration, so all the rendering is done by the cpu. A class 10 card will make a difference, but probably not enoug...
by obcd
Sun Apr 21, 2013 8:55 am
Forum: Nederlands
Topic: SD kaart
Replies: 11
Views: 3193

Re: SD kaart

Blijkbaar is raspi-config niet aanwezig in raspbmc.
Je zou kunnen proberen om het te installeren met
sudo apt-get install raspi-config
uiteraard moet je daarvoor een internet verbinding hebben.
Het is mogelijk dat apt-get ook ontbreekt. In dat geval zul je ook een command not found krijgen.
by obcd
Sat Apr 20, 2013 2:34 pm
Forum: Troubleshooting
Topic: [SOLVED] Internet connection problems
Replies: 6
Views: 15464

Re: Internet connection problems

Have you tried to ping your router from another pc?
Have you tried a restart of your router? Not all router firmwares keep running stable.
by obcd
Sat Apr 20, 2013 12:45 pm
Forum: Troubleshooting
Topic: Power problems on new Pi
Replies: 15
Views: 2198

Re: Power problems on new Pi

Do your harddisks have their own power adapter?
If they haven't, I would start with 1 harddisk. They can have a rather big spinup current.
If you connect the usb hub to your mac, does it recognises the harddisks like it should?
by obcd
Fri Apr 19, 2013 5:19 pm
Forum: Troubleshooting
Topic: Trouble booting - red light steady, *very* dim green light
Replies: 10
Views: 12178

Re: Trouble booting - red light steady, *very* dim green lig

If you have another sd card, you could test that to make sure it's not causing the problems. If that doesn't work, you could consider requesting an rma to have it replaced under warranty. It could be a bad soldering of the bga soc that makes bad contact. You could try if it boots when you press on t...
by obcd
Fri Apr 19, 2013 4:55 pm
Forum: Troubleshooting
Topic: Trouble booting - red light steady, *very* dim green light
Replies: 10
Views: 12178

Re: Trouble booting - red light steady, *very* dim green lig

The Pi uses a linear regulator to lower the voltage from 5V to 3V3 for internal use. The red power led is simply connected to that 3V3 power rail. It will even light when the supply voltage is only 4V. The green ACT led is like the harddisk led on a computer. It lights when the pi sd card is accesse...
by obcd
Thu Apr 18, 2013 6:39 am
Forum: Beginners
Topic: A few questions from an absolute beginner
Replies: 6
Views: 1441

Re: A few questions from an absolute beginner

Make sure your access point is broadcasting it's ssid. The Pi doesn't connect to an access point with a hidden ssid. The hibernate existed on xbian, but have you also checked it? You can issue a poweroff on the Pi, but I think you have to reset it or do a power cycle to have it running again. I am u...
by obcd
Thu Apr 18, 2013 6:32 am
Forum: Beginners
Topic: combining keyboard and mouse
Replies: 3
Views: 762

Re: combining keyboard and mouse

Bringing power in trough the usb was a problem on the rev. 1 Pi's. Those had polyfuses in the usb power lines that couldn't handle the current needed to get the Pi running. One other thing is that you bypasses the main polyfuse on the board. This could give you an advantage as some of those Polyfuse...
by obcd
Thu Apr 18, 2013 6:19 am
Forum: Troubleshooting
Topic: Cannot get past problems...
Replies: 16
Views: 1504

Re: Cannot get past problems...

Is that usb harddrive having it's own power adapter or is it getting it's power over the usb connection?
What brand, type and size is it?
What OS revision are you using? uname -a will give you that information.
What are you using to power the Pi?
by obcd
Wed Apr 17, 2013 3:53 pm
Forum: Staffroom, classroom and projects
Topic: A suggestion for the Foundation
Replies: 16
Views: 2292

Re: A suggestion for the Foundation

A faster or dual core soc would make it more power hungry.
Your advantage of having a low power device would be gone.
by obcd
Wed Apr 17, 2013 3:40 pm
Forum: Troubleshooting
Topic: USB Serial Problem
Replies: 5
Views: 1203

Re: USB Serial Problem

You should send your data in bursts for a normal test. Adding a delay of 0.2 sec after every datablock should give the receiver (pi) time to catch up with the datastream of the transmitting device, and no data should get lost like that, even without handshaking. The previous proposed solution change...

Go to advanced search