Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [arm]

ARM is a 32-bit reduced instruction set computer (RISC) instruction set architecture (ISA) developed by ARM Holdings. It was named the Advanced RISC Machine and, before that, the Acorn RISC Machine. The ARM architecture is the most widely used 32-bit instruction set architecture in numbers produced.

0
votes
0answers
52 views

QEMU crashed while trying to boot up i.MX6q device kernel

When tried to boot up Kernel uImage of an i.MX6q based embedded device, it seems that QEMU crashes with "Unable to handle kernel NULL pointer dereference at virtual address 00000044". Before crashing ...
0
votes
1answer
143 views

Linux Headless Server Audio Player RTP stream

I am streaming audio from a linux server (192.168.0.10) to a headless client using ffmpeg. ffmpeg -i INPUT -acodec libmp3lame -ar 11025 --f rtp rtp://192.168.0.100:1234 On the headless client, I am ...
2
votes
1answer
430 views

systemd not restarting my process

I have the following service configured: [Unit] Description=HB service started [Service] Restart=always # or always, on-abort, etc RestartSec=3 WorkingDirectory=/home/debian/hb/program ExecStart=/...
1
vote
0answers
74 views

How to debug nfsrootfs not booting issue

We have Beaglebone black based custom board with 4GB eMMC and 256MB RAM. We use network boot for putting software on eMMC for very first time. For this purpose we have configured ubuntu PC for ...
-4
votes
1answer
448 views

Faking CPU architecture on Debian [closed]

I have a server which uses the armhf (armv7l, Cortex A9 ARMv7 to be precise) CPU architecture. I've been trying to install a certain package on it, but that doesn't work. First off, APT mentioned it ...
0
votes
0answers
71 views

1000Mbps RGMII and 100Mbps PHY

An ARM SoC (Amlogic S905) indicates that the ethernet is 1000Mbps RGMII and 100Mbps PHY. Does that mean that the communication with the physical layer is slow?
1
vote
0answers
1k views

How to test RAM on embedded ARM system? (Linux, no console)

I get a lot of memory dumps in dmesg, It seems to me every time the OS is trying to use any more than about 100 MB of RAM weird things are happening. How can I test RAM on ARM, on running Linux ...
2
votes
0answers
737 views

mq_send : bad file descriptor

I have tried executing sample message queue programs on arm (linux) platform and mq_send() throws error number 9 (Bad file descriptor). 1) mq is enabled in kernel i.e CONFIG_POSIX_MQUEUE and ...
0
votes
0answers
606 views

Using RTC to synchronize ntpd when offline

I need a stable configuration, presumably using ntpd, to keep system clock as precise as possible. Background: I have several embedded devices (arm9) running linux (currently: 3.16.1 / debian 7.2) ...
1
vote
0answers
225 views

ssh hangs in Ubuntu MaaS heterogeneous cluster

I have the following issue when using ssh on my local network. I have setup a small cluster of Xeon machines using MAAS. I have installed Ubuntu Server 12.04 on all machines and configured local ...
2
votes
2answers
1k views

CPU Affinity on ARM processors

I am using some RaspberryPI boards for a data acquisition system. They are nice boards, with plenty of community support around them, but they are really slow. I am thinking of gradually replacing ...
1
vote
1answer
617 views

Cannot start OpenVPN on sheevaplug. Any suggestions?

I installed OpenVPN on my arm-based sheevaplug (OS is Debian 7 Wheezy, kernel 3.8.8.) but as soon as i try to start the service i receive the following error: [....] Starting virtual private network ...
1
vote
1answer
829 views

Packets do not reach FILTER chain of iptables

I have a problem I cant figure out, I am trying to access webserver on [RPI], but packets never reach iptables FILTER chain I will try to explain it a bit: GW1 has public address and doing DNAT from ...
1
vote
2answers
254 views

I've installed “dash” but still see “bash” when I login via SSH [closed]

I've configured my Raspberry Pi to use "dash" for default shell, as instructed here. I have Dropbear for SSH. When I login via SSH, I still see the "bash" console, and not "dash". How to change ...
0
votes
1answer
274 views

ARM Debian (squeeze) USB driver with mismatch 3.3.3 kernel but /lib/modules/2.6.36

Hei guys, my sheevaplug embedded server works fine, but when I wanted to use USB, the device gets not attached to /dev/tty/USB0 lsusb shows correctly: Bus 001 Device 002: ID 067b:2303 Prolific ...
19
votes
5answers
38k views

What are the best possible ways to benchmark RAM (no-ECC) under linux / arm?

I want to test integrity and global performances of no-ECC memory chips on a custom board Are there some tools that run under linux so I can monitor system and global temperature in the same time ? ...