kernelpanik

Updating vendor firmware and LineageOS GSI on Samsung Galaxy S20 FE 5G

Due to the lack of well-maintained community Android ROMs / firmware for Samsung Galaxy S20 FE 5G, the best option stills seems to be using the stock firmware as base and install a GSI image on top. See my older post here: https://kernelpanik.net/

android

Fix SMS reception on Samsung Galaxy S20 FE 5G

Recent Samsung vendor firmware, like in G781BXXSAHXC6 from April 2024, breaks SMS reception with recent GSI firmware, for example Andy Yan's LineageOS 20 GSI from https://sourceforge.net/projects/andyyan-gsi/files/lineage-20-light/ Based on the same fix for a different device (https://github.com/

linux

Upgrade Ubuntu Asahi 23.10 (Mantic) to 24.04 LTS (Noble)

Few notes on upgrading Ubuntu Asahi from 23.10 (Mantic) to 24.04 LTS (Noble): Upgrade all available packages: sudo apt update sudo apt upgrade Kernel update to 6.8 for Mantic had broken dependencies, so I had to disable this PPA: sudo mv

linux

Ubuntu Asahi on MacBook Pro (14" M2 Pro, Model j414)

2024-04-28 Update: I upgraded to my existing 23.10 (Mantic) installation to 24.04 LTS (Noble). See upgrade notes here: https://kernelpanik.net/upgrade-ubuntu-asahi-23-10-mantic-to-24-04-lts-noble/ A quick personal summary on using Ubuntu Asahi on a MacBook Pro (14" M2 Pro, Model j414) with arm64 CPU.

linux

Fixing broken file upload after occ files:scan

In order to organize an ownCloud upload folder with lots of files, I created new folders for each year manually on the server and moved files over in the terminal. Of course ownCloud didn't know about those moved files and still expected them to

MicroVMs on Ubuntu Asahi using krunvm

Based on slp's Using microVMs for Gaming on Fedora Asahi I tried to get things running on Ubuntu 23.04. There is no PPA for this yet (afaik), so we'll have to build stuff manually here. Preparations mesa (required for native-context support) # clone Git

OpenZFS 2.2 on Ubuntu Asahi / Ubuntu 23.04

The Ubuntu Asahi flavor of Ubuntu 23.04 (Lunar) includes kernel version 6.5 from Ubuntu 23.10 (Mantic), with the Asahi-specific patches applied on top (for the stuff that hasn't been upstreamed yet). That kernel already brings ZFS 2.2.0~rc3 and

Access to macOS recovery OS files from Linux

There might be the need to fetch some files which contain firmware from the recovery OS partition, without booting into macOS. Fortunately, we can mount APFS volumes read-only on Linux using apfs-fuse. Install apfs-fuse from https://github.com/sgan81/apfs-fuse (follow README.md) Create

android

Android GSI on Samsung Galaxy S20 FE 5G

Update 2024-05-16: This guide below should still work, but I recently updated to newer versions of everything, so you might also want to check out https://kernelpanik.net/updating-vendor-firmware-and-lineageos-gsi-on-samsung-galaxy-s20-fe-5g/ In order to overcome the Samsung stock image with all its built-in and hard to

linux

OpenZFS 2.x on Ubuntu 20.04 LTS

On 30 Nov 2020, OpenZFS version 2.0 has been released with plenty of new features and performance improvements: https://github.com/openzfs/zfs/releases/tag/zfs-2.0.0 Ubuntu Linux 20.04 LTS normally comes with kernel 5.4, with built-in ZFS version

linux

Install OpenZFS on Amazon Linux 2

OpenZFS (aka ZFS on Linux) supports different Linux distributions, but Amazon Linux 2 isn't mentioned in the documentation. As the OS is quite close to CentOS / RHEL, you can just follow the steps here: https://openzfs.github.io/openzfs-docs/Getting Started/RHEL and CentOS.

iot

IoT insecurity by example

Apexis is a known manufacturer of IP cameras. Other companies like Logilink, Foscam or Denver also sell branded IP cameras which are based on the same hardware design and firmware contents. These IP cameras have some insecurity specialties: UPNP is active by default for

linux

Dell OMSA 7.4 on Ubuntu 16.04

Ubuntu 16.04 is not officially support by Dell, but 14.04 is. So I tried to install the OMSA packages for 14.04, which almost works out of the box: Add APT repository at /etc/apt/sources.list.d/openmanage.list: deb http:

osx

Mac OSX mobile accounts using ZFS snapshots

I was trying to get Portable Home Directories (PHD) working on Mac OSX using the Mobile Accounts feature. The idea is that a network user should be able to login into one computer today and into another tomorrow, while having the same data and

linux

Run Mac OS X Yosemite on KVM

Update 30.04.2015: I was able to run Yosemite after switching to QEMU 2.3 and Chimera 4.1. See below. In the last post we set up a VM running Mac OSX Yosemite the help of VirtualBox. Now what if we would

tools

Converting CVS repositories to Git

For convertig CVS repositories to Git I found a nice tool called crap (https://github.com/rcls/crap). However, if you need to convert a larger number of repositories it's better to automate the single commands with shell a script: #!/bin/bash cd for

firmware

BIOS on Supermicro X9SRA

The Supermicro X9SRA mainboard (see http://www.supermicro.com/products/motherboard/Xeon/C600/X9SRA.cfm) has an AMI BIOS. There are at least two issues: You can't disable the 'Intel ME' feature. There are problems with the 'mei_me' driver in Linux which freeze

firmware

What's inside a Force10 firmware?

I'm working with Dell Force10 switches and noticed that for S25N / S50N models there hasn't been a new firmware released since 2012. The current firmware has version 8.4.2.7. For S4810 models the current firmware is version 9.6.0.0 from

linux

Rename a Linux network interface without Udev / Reboot

If you want to rename a network interface on Linux in an interactive manner without Udev and/or rebooting the machine, you can just do the following: ifconfig peth0 down ip link set peth0 name eth0 ifconfig eth0 up Interface peth0 will be instantly

linux

Running Ceph on ZFS

Ceph is a distributed storage system which aims to provide performance, reliability and scalability. ZFS is an advanced filesystem and logical volume manager. ZFS can care for data redundancy, compression and caching on each storage host. It serves the storage hardware to Ceph's OSD

fonts

Host web fonts on your server

There are several reasons why you might not want to include web fonts from e.g. fonts.googleapis.com on your website. Your vistors can be easily tracked by Google and others. See http://fontfeed.com/archives/google-webfonts-the-spy-inside/ for more details. An alternative is

virtualization

Run Mac OS X Yosemite on VirtualBox

For testing purposes it's handy to have a VM of your OS of choice on your developer machine. When testing with Mac OSX, VirtualBox can be used as a free alternative to VMware Fusion or Parallels Desktop. You following things: create Apple-ID if not