Category Archives: Hacks

Kernel – 5.9-rc6 – Rare Compile Fail!

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Kernel 5.9-rc6 has been released, and brief details are here:  http://lkml.iu.edu/hypermail/linux/kernel/2009.2/05870.html In a very rare occurrence, the kernel compile actually fails: …………………………….. CALL scripts/checksyscalls.sh CALL scripts/atomic/check-atomics.sh DESCEND objtool CHK include/generated/compile.h CC drivers/dax/super.o drivers/dax/super.c:325:6: error: redefinition of ‘dax_supported’ 325 | bool dax_supported(struct dax_device *dax_dev, struct block_device *bdev, | ^~~~~~~~~~~~~ In file included from drivers/dax/super.c:16: ./include/linux/dax.h:162:20: note: previous definition … Continue reading →

Fedora – Fun with ZRAM..

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Fedora 33 will be using ZRAM as standard for swap, rather than a partition or swapfile on disk.    I had no problem with this on a new F33 install (Odroid H2Plus) but after upgrading an existing Fedora 32 system it refused to initialise, and ‘/dev/zram0‘ did not exist.    Research revealed that the documentation for much of this … Continue reading →

Kernel – 5.9-rc2 – NVIDIA Patches, Kernel Taint, and Wait for VMware 16..

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Kernel 5.9-rc2 is out, and brief details of changes since -rc1 are here: http://lkml.iu.edu/hypermail/linux/kernel/2008.2/10710.html The patched VMware 16 prerelease versions of vmmon and vmnet compile OK, but any further tests will have to wait until the release of Workstation 16 in about a months time.. NVIDIA 450.66 can be made to (almost..) work, by applying the 5.9 … Continue reading →

Kernel – 5.9-rc – Preliminary Testing – Breaks VMware and NVIDIA, and VirtualBox..

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After all the excitement around the release of Kernel 5.8, I ran some tests on the work-in-progress git version (August 9th) of Kernel 5.9-rc1.   Obviously, there are more changes to come before RC1 is actually released.. NVIDIA 450.57 compile fails: ……………………. CC [M] /home/rgadsdon/NVIDIA-Linux-x86_64-450.57/kernel/nvidia-uvm/nv-kthread-q.o CC [M] /home/rgadsdon/NVIDIA-Linux-x86_64-450.57/kernel/nvidia-uvm/nv-kthread-q-selftest.o CC [M] /home/rgadsdon/NVIDIA-Linux-x86_64-450.57/kernel/nvidia-uvm/uvm8.o In file included from /home/rgadsdon/NVIDIA-Linux-x86_64-450.57/kernel/nvidia-uvm/uvm8.c:31: /home/rgadsdon/NVIDIA-Linux-x86_64-450.57/kernel/nvidia-uvm/uvm8_va_range.h: In … Continue reading →

VirtualBox – Latest Development Version Tests with Kernel 5.8 – Unstable..

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I have been investigating alternatives, as VMware is currently a non-starter (literally..) with Kernel 5.8.. I installed the latest VirtualBox (6.1.97 r139689) from SVN (another blast from the past…) and managed – after some messing around – to get it to compile OK on my Fedora 32 test system with Kernel 5.8 (from kernel.org..)    I had … Continue reading →

ARM64 – 8GB Pi4 – Fun with Fedora..

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My 8GB Raspbery Pi 4 finally arrived, and I was looking forward to trying Fedora 32 and KDE/Plasma on it, and comparing it to the Odroid N2 from a few months back.. ( http://rglinuxtech.com/?p=2689 ) The Fedora 32 aarch64 install is supposed to support the Pi 4 now, but the resulting sdcard image failed to boot, with … Continue reading →

Kernel – 5.8 Pre-testing.. Fix for NVIDIA. Problems with VMware Runtime.

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There is now an interim patch available, for NVIDIA 440.82 and Kernel 5.8, at https://gitlab.com/snippets/1986228 This should be applied as well as the 5.7 patch, and I have tested this with pre-release Kernel 5.8-git version from June 12th, and it works OK.    Note that this is an interim patch, and may be updated once 5.8-rc1 is released.. … Continue reading →

GCC – Fun with GCC 10, and the Kernel, NVIDIA, VMware..

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I have updated some test systems (x86_64 and aarch64) to pre-beta Fedora 32, which now includes GCC 10: $ gcc –version gcc (GCC) 10.0.1 20200216 (Red Hat 10.0.1-0.8) There have been a couple of problems with kernel compilation, but in each case there was already a patch/workaround available.. https://www.spinics.net/linux/fedora/fedora-arm/msg13193.html and https://lkml.org/lkml/2020/1/29/494 The most serious problem was a … Continue reading →

ARM64 – Odroid N2 – Latest U-Boot, Kernel 5.6-rc2, EFI, Fedora 31, Plasma/Wayland

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I have recently acquired an Odroid N2 (4GB) and managed – with some difficulty – to get it to run a ‘modern’ U-Boot, Kernel 5.6-rc2, with EFI support, and Fedora 31. This time, there were no clues from OpenSuse, and all the examples I found still used the ancient/custom Hardkernel u-boot and a kernel.img ‘blob. Fortunately, the … Continue reading →