SOLVED Unable to login after activate KVM support in kernel

[smokyrun]

Hello All,

I trying to install QEMU/KVM on my Gentoo, so before installation I follow this wiki "https://wiki.gentoo.org/wiki/QEMU" to prepare the kernel when I activate this 2 modules below in kernel, after boot I can't to login to my desktop nor access to the system with console, to fix this problem I must to rollback on the previous kernel.

[Hu]

KVM support should not be able to cause this problem. What processes become uncooperative when running a KVM-enabled kernel? What errors do they log?

[smokyrun]

When I look at in messages logfile the last message write before shutdown is by elogind :

[grknight]

[smokyrun]

When I look generated messages during the boot system messages log are OK

https://pastebin.com/LgweUWmu

I don't know why I can't login across desktop and why I can't run any system console when I activate KVM kernel module.

Thank you for your help.

[Hu]

That output looks to me like the proprietary nVidia drivers did something that caused a warning. Does this work if you direct the kernel not to load the proprietary nVidia drivers?

[logrusx]

[smokyrun]

In fact any Nvidia drivers is loaded from kernel because I have an hybrid graphic card whose primary is an Intel card, only this one is loaded from the kernel.

In the messages log I found this message :
Mar 9 17:54:52 himalaya kernel: RSP: 002b:00007ffe077e9010 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Mar 9 17:54:52 himalaya kernel: RAX: ffffffffffffffda RBX: 0000000000000020 RCX: 00007f72bd020f1b
Mar 9 17:54:52 himalaya kernel: RDX: 00007ffe077e9150 RSI: 00000000c020462b RDI: 0000000000000009
Mar 9 17:54:52 himalaya kernel: RBP: 00007ffe077e90c0 R08: 00007ffe077e9150 R09: 00007ffe077e916c
Mar 9 17:54:52 himalaya kernel: R10: 00007ffe077f0248 R11: 0000000000000246 R12: 00007ffe077e9150
Mar 9 17:54:52 himalaya kernel: R13: 0000000000000009 R14: 00000000c020462b R15: 000000000000002b
Mar 9 17:54:52 himalaya kernel: </TASK>
Mar 9 17:54:52 himalaya kernel: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 3.301 msecs
Mar 9 17:55:30 himalaya kernel: elogind-daemon[1518]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
Mar 9 17:55:30 himalaya shutdown[3706]: shutting down for system halt

I don't know if it's important

Thank you for your help.

[smokyrun]

About desktop I mean Cinnamon desktop, to run system console I run Crtl+Alt+F1 or F2... but in this case that doesn't work, I run the system in rescue mode to try to investigate

[logrusx]

[smokyrun]

Thank you so much for your help Georgi, I did Ctrl+PrintScreen+R prior opening a console terminal but always unable to open session.

I checked all option in my BIOS about virtualisation everything is OK
I upgraded my system yesterday but the problem persist.

I think the problem is not a problem with the kernel but with pam modules regarding the content of auth.log :

[logrusx]

[smokyrun]

Yes I'm unable to switch to a framebuffer console and my login is accepted but unable to open a cinnamon session I only have the wallpaper of the desktop.

Thank you for your help.

[logrusx]

Describe how you updated your kernel and share the kernel config.

Best Regards,
Georgi

[smokyrun]

Please find below the content of .config file :

https://pastebin.com/NXfmfrF3

To update my kernel :

1) I remove in /boot {System.map-6.6.13-gentoo config-6.6.13-gentoo initramfs-6.6.13-gentoo.img vmlinuz-6.6.13-gentoo}
2) In /usr/src/linux run make menuconfig
3) I set all module and parameters I need and I save modifications
4) I run make -j8
5) I run make modules_install
6) I run make install
7) I run grub-install --target=x86_64-efi --efi-directory=/boot/efi
I run grub-mkconfig -o /boot/grub/grub.cfg

Kind regards,

Willy

[smokyrun]

I forget this step :

dracut --kver 6.6.13-gentoo

[logrusx]

You don't need 1 and 7 is only needed if there's been a grub package update that concerns the loader.

Now I'm not a kernel config guru, I hope somebody else step in, in the mean time why don't you try booting gentoo-kernel-bin and see if it works. If it does, post the output of lsmod and lspci -nnk. Or boot with the LiveGUI and post the outputs of the same two commands.

Best Regards,
Georgi

[smokyrun]

[logrusx]

I guess this is from gentoo-kernel-bin? If so, is there a reason you don't want to tun it? Custom kernel configuration is tedious.

Best Regards,
Georgi

[smokyrun]

No, it is a comoiled kernel, I think my problem is not a kernel problem but a problem with X11.
I disabled display-manager and xdm and the system works fine, any problem.
My graphic card is an hybrid card with an Intel card as primary and an Nvidia card as secondary, I'm not sure but I think when a activated KVM module in the kernel the system prefer to use the Nividia card, which is more effcient than the Intel, currently I'm trying to see how to do to allow the system to use the Nvidia card.

Before the activation of KVM module the system used the Intel card and worked fine.

Kind regards,

Willy

[logrusx]

[smokyrun]

No I didn't I'm going to do it.

Thank you.

[smokyrun]

Thank you so much for you help Georgi, now everything work fine
I reemerge nvidia-drivers as you told me after that the system told to set IBT parameter to off in the kernel, after the compile of kernel everything are OK;

I'm very happy, I succeeded to set up :
Gentoo
Lightdm
Cinnamon
Nordvpn
KVM

Thank you again for your help and your advises !!!

Kind regards,

Willy