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1500 questions
23
votes
6 answers
Can the Raspberry Pi power this 2.5" drive without a USB hub?
I want to use my Raspberry Pi model B as a NAS, but I'd like to avoid using a USB hub. I have a 2.5" Western Digital 1 TB USB hard disk drive (this one), and a 2 A power supply for the Raspberry Pi that I'm planning on using with it.
Will this work?…
vkjb38sjhbv98h4jgvx98hah3fef
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23
votes
6 answers
How do I reboot at a specific time?
Is it possible to re-boot my Raspberry Pi at midnight each night? I know in Linux, you'd use crontab, but I can't seem to find /etc/crontab.
Phorce
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23
votes
5 answers
How can I permanently fix /dev/vchiq permission errors?
I am working on writing a graphical application that uses the Pi's GPU, and I constantly get * failed to open vchiq instance errors when running my programs. This is usually fixed by a sudo chmod 777 /dev/vchiq, but (1) this is a very insecure fix…
fouric
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23
votes
2 answers
What kernel parameters are available for fixing USB problems
There's a lot of problems with USB stack on Rapsberry Pi and developers are working hard to fix as many of them as possible. They introduce some kernel modules options (like dwc_otg.fiq_fix_enable) that enables those fixes from time to time. Most of…
Krzysztof Adamski
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23
votes
3 answers
Why won't my Raspberry Pi overclock?
I edited the file /boot/config.txt to increase the CPU speed to 800MHz.
dmesg includes the following line
bcm2835-cpufreq: Freq 800000->700000 (min=700000 max=800000 target=700000 request=700000)
Sure enough, my CPU is only running at 700MHz.
Why…
John Smith
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23
votes
7 answers
Connect to unsecured wireless network
I want to connect to a wireless network (no password needed)
I tried this
sudo iwconfig wlan0 essid network-essid
and tried this, in /etc/network/interfaces
auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-ssid ="network-essid"
but…
Lkaf Temravet
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23
votes
2 answers
How to get remaining memory in SD Card?
I have 16 GB SD card where I installed Raspbian using Win32 Disk Imager. After burning the image in Windows it shows only around 40+ MB of free space.
Since Raspbian image is around 2 GB where is rest of the memory? In Linux, using GParted I am…
user40138
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23
votes
7 answers
Is there a lightweight webserver that will serve dynamic content?
I'm building an image with a Nagios server. One of the problems of the raspberry pi is that the memory is quite small on the raspberry pi. So I'll be using a light weight interface based on php-apc instead of the standard one.
I was wondering what…
Lucas Kauffman
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- 15
23
votes
6 answers
Is there a way increase text size in Raspbian?
Abandoned post by Unregistered user.
I am currently running a Raspberry Pi on a television and the text size is too small to read. So I was wondering if there is a way to resize the text.
ben
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23
votes
2 answers
Why doesn't my external hard drive appear in /dev?
I want to mount my external HDD, but my Raspberry Pi can't recognize anything.
I loaded usb-storage with modprobe, but if I insert the HDD into the USB port, nothing changes. I can't see any changes neither in the lsusb -l, nor in dmesg, nor in…
Gergely Fehérvári
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23
votes
6 answers
How can I connect an analog to digital converter (ADC)?
I'm looking at options for ADC on the Rasbperry Pi. I'm wondering what is possible so far. Of course easy and cheap is good.
John La Rooy
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23
votes
2 answers
Should all 'Linux-compatible' USB bluetooth/Wi-Fi devices work?
I have mini-WiFi and mini-bluetooth dongles patiently awaiting the arrival of a Raspberry Pi. These are listed as Linux-compatible devices.
Are there any concerns with the hardware of the Raspberry Pi compared to a full PC stack, i.e. having a USB…
Beeblebrox
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23
votes
4 answers
How to emulate Raspberry Pi in QEMU?
A few years ago, people were saying they were able to emulate a Raspberry Pi 2 or 3 in QEMU.
However as of late 2020, I am unable to do so.
Can anyone let me know what the correct command line arguments are to emulate a Raspberry Pi 3 or 4 in…
wudude
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23
votes
7 answers
Using PCI or PCIe Devices
Is it possible to use some sort of adapter, or even to solder a device to the Raspberry Pi board to support PCI or PCI express devices? I'm thinking smaller devices such as NICs or Sound Cards. I wouldn't think there would be enough voltage to run…
Kyle Macey
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23
votes
3 answers
No HDMI output when HDMI cable is connected after power supply
I've noticed that I don't get any HDMI output to a monitor if I connect the HDMI cable to the Pi after I plug in the power supply, because I have two RPis for one monitor -- one running Raspbmc, the other running RetroPie. Does anyone else have this…
3cheesewheel
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