With my older machine locking up once too often at in-opportune times,
I've switched over to a newer machine, which I've tried to set up
identically.  QEMU is not laumching.  It worked on the older system.
The error message is...

[x8940][waltdnes][~] /home/misc/qemu/arca/boot
Could not access KVM kernel module: No such file or directory
qemu-system-x86_64: failed to initialize kvm: No such file or directory

  My user is a member of the kvm group, and I get the same error trying
to launch as root

My system...

* 12-core Intel Skylake with 16 gigs of ram, 64-bit gentoo

* Yes, KVM support is installed in the kernel...
[x8940][waltdnes][~] zgrep KVM_INTEL /proc/config.gz 
CONFIG_KVM_INTEL=y

* make.conf contains
QEMU_SOFTMMU_TARGETS="i386 x86_64"
QEMU_USER_TARGETS="i386 x86_64"

* including flags in package.use, I get
[x8940][waltdnes][/etc/portage/package.use] emerge -pv qemu

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] app-emulation/qemu-5.2.0-r3::gentoo  USE="aio alsa bzip2 curl 
doc fdt gtk jpeg opengl oss png sdl slirp ssh usb vhost-net vnc -accessibility 
-caps (-capstone) -debug -filecaps -glusterfs -gnutls -infiniband -io-uring 
-iscsi -jack -jemalloc -lzo -multipath -ncurses -nfs -nls -numa 
-pin-upstream-blobs -plugins -pulseaudio -python -rbd -sasl -sdl-image -seccomp 
(-selinux) -smartcard -snappy -spice -static -static-user -systemtap -test 
-udev -usbredir -vde -vhost-user-fs -virgl -virtfs -vte -xattr -xen -xfs -zstd" 
PYTHON_TARGETS="python3_8 -python3_7 -python3_9" QEMU_SOFTMMU_TARGETS="i386 
x86_64 -aarch64 -alpha -arm -avr -cris -hppa -lm32 -m68k -microblaze 
-microblazeel -mips -mips64 -mips64el -mipsel -moxie -nios2 -or1k -ppc -ppc64 
-riscv32 -riscv64 -rx -s390x -sh4 -sh4eb -sparc -sparc64 -tricore -unicore32 
-xtensa -xtensaeb" QEMU_USER_TARGETS="i386 x86_64 -aarch64 -aarch64_be -alpha 
-arm -armeb -cris -hppa -m68k -microblaze -microblazeel -mips -mips64 -mips64el 
-mipsel -mipsn32 -mipsn32el -nios2 -or1k -ppc -ppc64 -ppc64abi32 -ppc64le 
-riscv32 -riscv64 -s390x -sh4 -sh4eb -sparc -sparc32plus -sparc64 -tilegx 
-xtensa -xtensaeb" 0 KiB

* The startup script is...

[x8940][waltdnes][~] cat /home/misc/qemu/arca/boot
#!/bin/bash
cd /home/misc/qemu/arca
sudo /usr/bin/qemu-system-x86_64 -enable-kvm -runas waltdnes \
   -cpu host -monitor vc -display gtk \
   -drive file=arcac.img,format=raw \
   -netdev user,id=mynetwork \
   -device e1000,netdev=mynetwork \
   -rtc base=localtime,clock=host \
   -m 1024 -name "ArcaOS VM" \
   -vga std -parallel none \
   ${@}

  I repeat. it worked on the older machine.

-- 
Walter Dnes <waltd...@waltdnes.org>
I don't run "desktop environments"; I run useful applications

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