All Questions
Tagged with linux-kernelembedded
99 questions
0votes
2answers
56views
DRM initializing very late
I'm porting an embedded Linux device to mainline from a vendor kernel. I am almost there but there is one issue I can't seem to get rid of, which is DRM initializing very slowly. Here's the setup: SOC:...
- 51
0votes
1answer
19views
ALSA lib not outputing on custom linux
I am running a custom linux distribution on a custom board running on an ATSAMA5D29. I am managed to get the sound to work on the demo board, but when running it on custom hardware I get the error: # ...
1vote
0answers
119views
Ubuntu and Debian hard freeze, has display but no mouse and keyboard
I bought 2 rugged fanless embedded computers that appeared to be quite robust with name brand extended temperature components, vibration dampening, etc. I installed Ubuntu 24.04.1 and my desktop ...
0votes
0answers
111views
No driver for MIPI-DSI display in Linux kernel, but there is in U-Boot, is it going to work?
I'm going to buy a MIPI-DSI display for my single board computer. The display has SSD2828 chip inside. There is no driver for it in linux kernel 'linux/drivers/gpu/drm', but i found one in u-boot ...
0votes
1answer
116views
Keypad driver does not input character with input_report_key()
I am trying to create Linux input device driver and to test things I took at existing gpio-matrix-keypad driver. Using print I know that input_report_key() is called with correct keycode, but it doesn'...
1vote
1answer
630views
How to configure connmand to not to add the unnecessary route with IP 0.0.0.0 and GW 0.0.0.0
The below route is sticky, even if manually deleted, it gets added by connmand (Connection Manager Daemon) with another interface name. If the specific interface is made down using ip link cmd, I see ...
- 13
2votes
1answer
777views
How do I reference a port in the device tree?
Edit: this is a general question about referencing ports with phandles and the example I posted i.e. my particular case is not that relevant because meanwhile I have observed the same behaviour with ...
- 71
0votes
1answer
1kviews
Yocto - check if a device tree is enabled in the image
I am currently generating a specialized Yocto image for a Beaglebone device. In the resulting /tmp/deploy/images folder I can see the resulting image, plus alot of device tree files .dtb for different ...
- 1,233
1vote
0answers
280views
DRAM problem with an fit image of increasing size
I have a 512 MiB ram capacity on a proprietary board with the Zynq700 SoC. This corresponds to the address range [0x00000000,0x20000000]. I run a ram-based operating system on it and it works fine ...
2votes
0answers
159views
How to disable hot-pluggable CPU on ARM?
I have an ARM64 Cortex-A72 board running Linux 5.4.47. I want to check if the CPU hot-plugging is working correctly (it's needed for one project I want to use). Kernel has CONFIG_HOTPLUG_CPU enabled, ...
- 123
0votes
2answers
2kviews
Kernel panic - not syncing: Requested init /init failed (error -2)
Attaching a bit more of the boot log. HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages HugeTLB registered 32.0 MiB page size, pre-allocated 0 pages HugeTLB registered 2.00 MiB page size, ...
1vote
0answers
208views
Freescale armhf iMX6Q board doesn't boot with kernel 5.10 or greater
I am upgrading the kernel from version 3.17.0-rc4 to latest kernel version in a board that uses a iMX6Q Freescale processor, but the board doesn't finish to boot. I am cross-compiling using Debian 10 ...
- 111
3votes
1answer
932views
with a static hardware, do I need to recompile the dtb every time I update the kernel?
From my understanding, in systems without bus support for discovery/enumeration (mostly embedded systems), the dtb files are used to describe the hardware and allow the kernel to use it once it has ...
- 175
3votes
0answers
2kviews
Platform driver's probe function isn't called
I am developing a simple platform driver for beaglebone (but currently running on my virtual machine running Ubuntu) that uses device tree, but it doesn't seem like the probe function is being called. ...
- 141
1vote
0answers
117views
kernel error on init (reference to shared library error)
I'm trying to boot kernel on an stm32f469-disco board which is an ARM board with 16MB ram and 16MB flash storage. I've used buildroot to create my rootfs and kernel. after u-boot passes the control to ...
