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According to the source code this error is caused when trying to open a file (probably not an ordinary file, but a device). In variable v4l2dev, this variable is initilized to /dev/video1, but is over written by argv[1]. When you ran the program you used /dev/videoX. It is saying that /dev/videoX does not exist. I imagine that the docs intend you to replace ...


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When configuring a system against your own custom kernel, I would suggest adding a name to the current version in your modified kernel sources. For instance, in Armbian they create their own kernel packages, and add a -sunxi to kernel.release. Takin as an example modifying the 4.6.3 kernel version: root@ruir:/usr/src/linux-headers-4.6.3-sunxi# grep -ri 4....


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You need to set up a kernel virtual address mapping for the location e.g. mem_addr = ioremap_nocache(BASEADDR + OFFSET, SIZE); (you appear to have asked the same question twice - see enter link description here).


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Programs run from the initramfs are perfectly ordinary programs. They run like any other Linux process. Switching from real mode (the boot-time legacy mode of 32-bit x86 processors) to protected mode (the normal working mode of 32-bit x86 processors since the 286 generation) happens very early in the Linux kernel boot process. Even drivers have not started ...


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The initramfs filesystem is, to all intents and purposes, just another filesystem that's loaded at /, and programs that run in it are run from user space under the running kernel. This means they have the same limitations as any other program. You might find the data you want via /dev/mem but you probably shouldn't rely on specific iPXE implementations; ...


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After a research and the hints from Stephen Kitt, Ive found the solution. Like dmesg was showing "...the firmeware couldnt be loaded" so I installed the package "firmware-iwlwifi" which was missing. Thanks for the help.


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For a conventional operating system (not running under virtualization), kernel space and ring0 are synonymous in terms of the privilege. However, I must explain them separately, to highlight the differences present, and commonality they share. Kernel space - OS will typically have two modes of execution: kernel space, and the user space. Kernel space is ...


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The best way to figure out how the RHEL / CentOS kernel is built is actually to look at the source RPM's specfile. CentOS already has a wiki page on how to get the full kernel source, located at https://wiki.centos.org/HowTos/I_need_the_Kernel_Source. Read section 2 of that page. Once you have the source RPM (SRPM) installed, the file SPECS/kernel.spec ...


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I wrote a helper to easily generate EDID binary files, with proper checksum, from Xorg modeline format: https://github.com/akatrevorjay/edid-generator You can use this to easily generate yourself some fresh bins. I use it to get 60hz on my monitor as well as deal with Apple's Thunderbolt display's EDID woes. There are instructions for using it on that ...



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