Thanks!!! However, if there is an ISO somewhere in the github issue page, I did not find it.
Guess I’ll have to try to contain my eagerness and wait for your test ISO. 
I’m sorry for the long delay, there’s testing ISO:
Greetings from CachyOS Live environment. New ISO worked super-duper. THANKS!!!
So now, the question is, should I go ahead and install or wait for a non-testing ISO version?
EDIT: Actually, that is not even the question right now. Very likely, trying to proceed with an install is going to get me to a thermal shutdown. Just idling here it’s at 84C:
$ sensors
coretemp-isa-0000
Adapter: ISA adapter
Package id 0: +84.0°C (high = +86.0°C, crit = +100.0°C)
I’ve tried to install acpi-call-dkms to be able to turn off my Nvidia card that’s very likely causing much of the overheating, but the install balks seemingly because of the kernel name:
$ sudo pacman -Sy acpi_call-dkms
:: Synchronizing package databases...
cachyos 500.1 KiB 864 KiB/s 00:01 [------------------------------------] 100%
core 120.1 KiB 409 KiB/s 00:00 [------------------------------------] 100%
extra 7.8 MiB 2.54 MiB/s 00:03 [------------------------------------] 100%
multilib 131.9 KiB 349 KiB/s 00:00 [------------------------------------] 100%
resolving dependencies...
looking for conflicting packages...
Package (12) New Version Net Change Download Size
extra/clang 20.1.8-1 210.15 MiB 45.09 MiB
extra/compiler-rt 20.1.8-1 45.59 MiB 3.69 MiB
cachyos/dkms 3.2.1-2 0.15 MiB 0.05 MiB
core/gc 8.2.8-2 0.76 MiB 0.23 MiB
core/gcc 15.1.1+r7+gf36ec88aa85a-1 208.12 MiB 53.97 MiB
core/guile 3.0.10-1 54.73 MiB 8.31 MiB
core/libisl 0.27-1 5.75 MiB 0.87 MiB
extra/lld 20.1.8-1 6.57 MiB 1.92 MiB
extra/llvm 20.1.8-1 116.38 MiB 21.18 MiB
core/make 4.4.1-2 1.67 MiB 0.51 MiB
core/patch 2.8-1 0.17 MiB 0.08 MiB
extra/acpi_call-dkms 1.2.2-2 0.03 MiB 0.01 MiB
Total Download Size: 135.91 MiB
Total Installed Size: 650.06 MiB
:: Proceed with installation? [Y/n]
:: Retrieving packages...
make-4.4.1-2-x86_64 523.8 KiB 530 KiB/s 00:01 [------------------------------------] 100%
patch-2.8-1-x86_64 85.2 KiB 52.2 KiB/s 00:02 [------------------------------------] 100%
dkms-3.2.1-2-any 46.7 KiB 81.1 KiB/s 00:01 [------------------------------------] 100%
libisl-0.27-1-x86_64 886.4 KiB 422 KiB/s 00:02 [------------------------------------] 100%
acpi_call-dkms-1.2.2-2-any 12.1 KiB 37.1 KiB/s 00:00 [------------------------------------] 100%
gc-8.2.8-2-x86_64 234.5 KiB 101 KiB/s 00:02 [------------------------------------] 100%
lld-20.1.8-1-x86_64 1966.7 KiB 489 KiB/s 00:04 [------------------------------------] 100%
compiler-rt-20.1.8-1-x86_64 3.7 MiB 509 KiB/s 00:07 [------------------------------------] 100%
guile-3.0.10-1-x86_64 8.3 MiB 503 KiB/s 00:17 [------------------------------------] 100%
gcc-15.1.1+r7+gf36ec88aa85a-1-x86_64 54.0 MiB 1885 KiB/s 00:29 [------------------------------------] 100%
llvm-20.1.8-1-x86_64 21.2 MiB 650 KiB/s 00:33 [------------------------------------] 100%
clang-20.1.8-1-x86_64 45.1 MiB 1080 KiB/s 00:43 [------------------------------------] 100%
Total (12/12) 135.9 MiB 3.18 MiB/s 00:43 [------------------------------------] 100%
error: failed retrieving file 'gcc-15.1.1+r7+gf36ec88aa85a-1-x86_64.pkg.tar.zst' from archlinux.cachyos.org : The requested URL returned error: 404
(12/12) checking keys in keyring [------------------------------------] 100%
(12/12) checking package integrity [------------------------------------] 100%
(12/12) loading package files [------------------------------------] 100%
(12/12) checking for file conflicts [------------------------------------] 100%
:: Processing package changes...
( 1/12) installing libisl [------------------------------------] 100%
( 2/12) installing gcc [------------------------------------] 100%
Optional dependencies for gcc
lib32-gcc-libs: for generating code for 32-bit ABI
( 3/12) installing compiler-rt [------------------------------------] 100%
( 4/12) installing clang [------------------------------------] 100%
Optional dependencies for clang
openmp: OpenMP support in clang with -fopenmp
python: for scan-view and git-clang-format [installed]
llvm: referenced by some clang headers [pending]
( 5/12) installing lld [------------------------------------] 100%
( 6/12) installing llvm [------------------------------------] 100%
( 7/12) installing gc [------------------------------------] 100%
( 8/12) installing guile [------------------------------------] 100%
( 9/12) installing make [------------------------------------] 100%
(10/12) installing patch [------------------------------------] 100%
Optional dependencies for patch
ed: for patch -e functionality
(11/12) installing dkms [------------------------------------] 100%
Optional dependencies for dkms
linux-headers: build modules against the Arch kernel
linux-lts-headers: build modules against the LTS kernel
linux-zen-headers: build modules against the ZEN kernel
linux-hardened-headers: build modules against the HARDENED kernel
(12/12) installing acpi_call-dkms [------------------------------------] 100%
:: Running post-transaction hooks...
(1/3) Arming ConditionNeedsUpdate...
(2/3) Install DKMS modules
==> ERROR: Missing etc kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing usr kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing lib64 kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing sys kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing dev kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing home kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing bin kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing boot kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing tmp kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing lib kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing version kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing run kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing var kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing root kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing mnt kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing opt kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing srv kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing proc kernel headers for module acpi_call/1.2.2.
==> ERROR: Missing sbin kernel headers for module acpi_call/1.2.2.
(3/3) Updating linux initcpios...
==> Building image from preset: /etc/mkinitcpio.d/linux-cachyos.preset: 'default'
==> Using default configuration file: '/etc/mkinitcpio.conf'
-> -k /boot/vmlinuz-linux-cachyos -g /boot/initramfs-linux-cachyos.img
==> ERROR: specified kernel image does not exist: '/boot/vmlinuz-linux-cachyos'
==> Building image from preset: /etc/mkinitcpio.d/linux.preset: 'archiso'
==> Using configuration file: '/etc/mkinitcpio.conf.d/archiso.conf'
-> -k /boot/vmlinuz-linux-cachyos -c /etc/mkinitcpio.conf.d/archiso.conf -g /boot/initramfs-linux-cachyos.img
==> ERROR: specified kernel image does not exist: '/boot/vmlinuz-linux-cachyos'
error: command failed to execute correctly
HELP!
So while I was waiting for any input, I figured I ought to try the “Legacy Graphics” boot option. Not good. Got farther than previous ISO but wound up stuck at a screen with (sorry, going from memory):
Finished Initializing Pacman Keyring
Reached Target Multi-User System
Reached Target Graphical Interface
Yeah, but no graphical interface launches. Dead in the water…
I think your best bet is to limit the CPU frequency. You can do that in Live ISO using this command for example:
echo "powersave" | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
Thanks, @ventureo , but how much does the live KDE/Wayland environment rely on the nouveau driver and Nvidia graphics? Just having the card ON spikes my temperatures. If it’s actually being used, I’m screwed. My mobo has no fan control, can’t be undervolted, and the fan itself is a pitiful piece of plastic ware, about as effective as the old hand fans in churches back in the day…
No doubt if I do try this, I’ll also have to turn off turbo.