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Questions tagged [embedded-linux]

For questions related to Linux on embedded systems (e.g. mobile, consumer electronics, networking) or single-board computers (e.g Raspberry Pi)

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13 views

systemctl list services filtering by property “Type”

I need to list all services in my system having a given [Service] Type. In other words, I need to list all services with property Type=, e.g. notify. All other types of services shall not be included ...
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0answers
37 views

Read only file system on linux embedded device

I am using Qt to write an app to deploy to an embedded Linux device. My dev computer is a vm running Ubuntu and it communicates with the embedded device over ethernet and rs232. Qt has a section to go ...
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0answers
20 views

Embeded Software Linux HOSTAPD Connection Issues

First off I don't know if this the right forum to ask this in. If you know a better one, please let me know and I will post it there, don't just downvote the question... I have an older embedded ...
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1answer
66 views

Missing TUN/TAP driver on embedded Linux

I came a long way to encounter this problem, so several dead end steps will be omitted. I was trying to create a TAP interface. The first step taken was to check if I have the needed tool (which I ...
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0answers
35 views

Udev GOTO is not triggered

I try to rename my network interfaces on my linux embedded system, renaming is working fine, but my GOTO is not working and I cannot workout why. ACTION!="add", GOTO="net_name_slot_end" SUBSYSTEM!="...
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1answer
19 views

how to run system services by sending request via browser

I want to create an interface similar to that of a dsl router where you can edit network settings in the browser and restart the router with new settings. I want to edit some settings in the browser ...
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0answers
240 views

First boot fails when mounting partitions

I am building a system using buildroot. It uses systemd. When I flash and start the system for the first time, systemd reports only one error: [FAILED] Failed to start File System Check on Root ...
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0answers
48 views

Chrome kiosk: can auto updates and Safe Browsing downloads be disabled or blocked?

I are running Chrome in kiosk mode in custom linux environment, and have IoT devices that run on cellular. I am noticing that Chrome periodically downloads approximately 3MB of data an hour, updating ...
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0answers
21 views

Upgrading rootfs while preserving /etc

I am trying to find a solution to easily update an embedded linux device. I have been looking around and one of the solution I have found is to have 2 rootfs partitions. Let's say A and B. One of ...
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0answers
58 views

U boot send failed: Error when trying to load a u boot image

I am trying to load a uboot image on a PCB. The board uses a pre-configured script in which it attempts to boot the board and, seeing that there is no boot image, it downloads the image over Ethernet ...
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0answers
74 views

yocto embedded-linux system recovery

I work with Yocto Poky 1.7.3 on an imx6DL and i'm trying to implement a system recovery. I can boot system both from NAND and from SD card, but the "main" system resides on NAND. In case of corruption ...
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0answers
233 views

Can't connect to free wifi network with iwconfig in Linux embedded

at first sorry for my English, it's very bad. I hope you will understand my problem. I'm working on Yocto dizzy and I'm trying to manage Wi-Fi connections. On my board I have a wf111 module. When I ...
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0answers
33 views

Downsizing to almost embedded linux

I have a thin client machine with Puppy Linux on it and it works well. I would like to make it fast something like embedded Linux. All it needs to do is to run one Procesing sketch/app (java) in ...
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0answers
99 views

linux virtual comport drivers for AR drone.

I have been working on this problem for quite a while now and cannot seem to find the correct driver for Linux to interface with an STM32F407. The Linux runs on an AR drone 2.0. The STM already acts ...
0
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1answer
117 views

Cannot find USB external HDD /dev/sda

I am running as usual my orange pi one plus H6 ALL WINNER with ubuntu server and cannot find my exFat HDD on it, it detects the usb but not /dev/sda and cannot mount or access it, yes I tried with ...
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0answers
46 views

Can not use hibernate for ARM - Embedded linux

I'm trying to enable hibernate for arm as below step. mkswap /dev/mmcblk0p3 swapon /dev/mmcblk0p3 Add param to bootargs bootargs resume=/dev/block/mmcblk0p3 echo disk > /sys/power/state I got an ...
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0answers
159 views

How does tcpdump configure an interface it begins to capture packets from?

On an Arago embedded linux system, an interface would normally be able to ping other destinations on the network. However, the pings stop working when using a utility such as iperf or scp to send TCP ...
1
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1answer
223 views

U-Bboot won't autoboot but manual boot works fine

I've built an image for a Freescale iMX6 EVK board (ARM based), using Buildroot. It booted fine off an SD card, and I wanted to experiment with customized boot commands in U-Boot. I want to make the ...
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1answer
3k views

how to read CSD register from eMMC using mmc-utils

We have beaglebone black based custom board with 512MB RAM and 4GB eMMC. I was trying to read CSD register from the board however I am getting following error. # mmc csd read /dev/mmcblk0 MMC/SD ...
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1answer
65 views

Barebox: USB cannot detect by “usb” command

I have embedded system running Linux barebox. I can't detect the usb by command "usb". I have plugged in the usb storage but when i run "usb" it shows "USB: scanning bus for devices... 0 USB Device(...
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2answers
588 views

Instantly assign static IP address in embedded Linux

Is there some basic Linux way to assign a static IP address without writing some files, just for the current session until reboot?
0
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1answer
953 views

Lede and multiwan (mwan3), all interfaces offline

I've created two WAN interfaces, called wan and wan2, both show up in the Load balancing tab as being offline. I can still access the internet but I want to set up multiwan to direct specific zone's ...
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0answers
132 views

Two hosts can't ping themselves

I am working for a project on an embedded linux environment. I have a network made up of a gateway (192.168.1.1), two STB (Set-Top-Box: digital decoder) and a PC. The two host have IP respectively (...
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1answer
230 views

Booting linux kernel via bootftp

I have P2020RDB board with U-Boot 2013.01-00115 installed with custom embedded Linux distro and everything works fine for now. However, for some testing purposes, I need elegant way of switching ...
4
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2answers
2k views

How can I read the flash device ID that is installed, perhaps via the mtd interface?

In our embedded Linux solution using uClinux, I have just added a larger flash device. I want to be able to query which device I have installed (hardware device). The small and large device both have ...
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1answer
76 views

using dd to get certain parts of the sdcard - use bs and count?

Now that I am running dd, I am worried that I might be getting the bs and the count wrong… This is the command I used… dd if=/dev/nbd1 conv=sync,noerror bs=4M count=3082239 | gzip -c > /mnt/...
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1answer
391 views

How to get serial number or UUID from MTD device?

I have an embedded device with MTD device over NAND flash. Is it possible to get its serial number or UUID? I thought there might be a solution similar to getting UUID of hard drive but I didn't find ...
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0answers
222 views

mono installation stalls - mcs is not producing progress

I am trying to build Mono from its git repository on Freescale P2020RDB board. I've managed to build it on host machine with Debian 8 with cross compiler and it works like a charm. However, due to ...
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2answers
348 views

How to build a single-purpose Linux?

I like to build a robot, that it has an ARM-based computer(like raspberry pi) and Linux OS upon. I like when the user turns on the robot, robot runs it's specific program(that I have written in C ...
0
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1answer
107 views

Extracting mono-4.8.0.382.tar results in can't remove old file error

I am working on custom minimal embedded Linux distro and I've downloaded mono using wget http://download.mono-project.com/sources/mono/mono-4.8.0.382.tar.bz2. The download finished without problems, ...
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2answers
126 views

Remove first N lines from an active log file without logrotate

Is there a way to remove the first N lines from a log that is being actively appended by an application without using logrotate? (opkg install logrotate -returns: Unknow package 'logrotate')
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0answers
423 views

My UART receive a null character sometimes

In an embedded system, I use a GPS with others devices connected on 3 UARTs. When I use cat or minicom command with UARTs /dev/ttyUSB0 and others, I lose characters (I receive null character instead ...
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2answers
2k views

Kernel panic - not syncing: No init found

I am working on custom embedded Linux distribution on P2020RDB-PCA board and I've got stuck on following errors at boot time: EXT2-fs (mmcblk0p1): warning: mounting unchecked fs, running e2fsck is ...
0
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1answer
69 views

Router Web Server WAN Access

I have a ISP supplied D-Link router running a customized firmware. I am trying to enable access to router's web server on WAN. While the router does give this option under TCP/IP Settings > WAN ...
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0answers
242 views

Metasploit on openwrt Router [closed]

I know this is a stupid question but i still want to ask this question. I want to run metasploit on openwrt router which is actually a TP-link MR30 which have 400MHZ cpu and 32 MB RAM. I have managed ...
0
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1answer
280 views

No interfaces detected apart from loopback in OpenWRT

Installed OpenWRT in laptop Dell Latitude E5550, Booted up using live Ubuntu DVD and issued following commands. $ wget https://downloads.openwrt.org/chaos_calmer/15.05/x86/generic/openwrt-15.05-x86-...
0
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1answer
277 views

IPv6 conflict on same network

My requirement is, i am trying create a graphical user interface for my embedded system for ipv6.So i have option for setting manual IPv6 address.My requirement is when i enter manual IPV6 address,i ...
2
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0answers
69 views

are there any steps available to cross compile gdisk?

We need gdisk(from gptdisk) for am335x based custom board. We are using Linux OS on the board. We need to cross compile it. Is there any guide for the same ? I am not able to find any guide for the ...
0
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1answer
220 views

Assigning unique IP ranges for multiple USB Ethernet gadgets on a single host

I am currently developing an embedded device running Linux, that allows being connected to a Windows host using USB. To achieve this, I am successfully using the USB Ethernet gadget driver on this ...
0
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2answers
402 views

RT5572 can authenticate using WPA2, but can't get an IP address from DHCP

I have a system running open embedded Linux with the Ralink RT5572 wireless usb card. I have the driver installed along with wpa_supplicant and I need to be able to connect to a WPA2 secured network. ...
1
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0answers
464 views

Modifying IP camera firmware

I have a D-Link DCS-931L IP camera and it started to lose wifi connection regularly. To debug the problem I tried to log into it, but any remote access is prohibited (except web interface which is ...
0
votes
1answer
304 views

Embedded Linux board with NFS boot and SSH

We have a BeagleBone Black-based embedded Linux board. It has eMMC and I have setup for NFS boot also. When I am booting the board from eMMC, I am able to connect board through SSH but when I am ...
2
votes
1answer
3k views

Force a Linux kernel module to be compiled as a module instead of built-in

I have the sources of the kernel of an embedded Linux box (specifically a QNAP NAS) which is running a 64-bit v3.12.6 Linux kernel, together with the kernel config files. What I'm trying to do is ...
3
votes
1answer
10k views

mounted filesystem without journal. Opts: (null) while mounting ext4 fs

I am using Beaglebone black with NFS, I have formatted internal eMMC with ext4 filesystem, when i mount the file system using following command message popups telling filesystem is mounted without ...
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1answer
290 views

How to compile the linux without any audio codecs?

I want "no audio" functionality in an embedded system. So, any idea about how to configure kernel without any audio? Thanks.
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0answers
279 views

Chipsee 7 inch LCD support in Linux kernel 3.14

Has anybody ported Chipsee 7 inch LCD on Linux kernel 3.14 or later ? Is there any patch available for the same ? If no patches any suggestion porting Chipsee LCD support from Linux kernel 3.8 to ...
0
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1answer
43 views

Capture output from quickly rotating log

I am dealing with a misbehaving third-party program, the vendor of which seems happy to help if I can provide them with the debug log. They told me how to turn debug logging on and off, however ...
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2answers
962 views

How to install usbnet driver on kernel 2.4.23-2.5-ts/

I searched in the directory "/usr/lib/modules/2.4.23-2.5-ts/kernel/drivers/net/usb/" for the usbnet but i didn't find it so how can i install the usbnet driver,i don't know where to start or how to ...
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0answers
670 views

Can I use a squashfs file sitting on a hard disk as my rootfs?

I need to do remote updates on an embedded Linux box that has its rootfs on /dev/sda1. My first thought was to add an update partition and switch to it on update, but for reasons specific to our ...
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0answers
34 views

Package manager for target file system

I'm developing for an embedded linux application and I need to install some libraries that have a pretty lengthy list of dependencies. Is there a package manager out there that I can point to the ...