Gentoo Forums

Hello,

I have recently purchased a Canon Pixma MG2500 printer, and have attempted to follow the instructions here: https://wiki.gentoo.org/wiki/Printing#Locally_attached_printer_.28USB.29 to set it up.

I am still relatively new, and don't understand the kernel stuff super well, but I am using a ...

Not sure if you're still interested in a reply, but I had a similar issue, and solved it using advice from here: https://forum.xfce.org/viewtopic.php?id=7734

It turned out to be an issue with my dpi (dots per inch).

I was able to fix it using the advice from ToZ:
How about Settings Manager ...

xevra,

You can have wpa-supplicant and NetworkManager installed but you must only start NetworkManager. It will use wpa-supplicant.

Your wired network needs the 6.13 kernel but you have 6.12.
There is no need for a reinstall.

You can add the 6.13 kernel to your install and choose which one to ...

wpa-supplicant is now configured (although the ip keeps jumping around because I suspect NetworkManager and wpa_supplicant are fighting for control of the device, but I will remedy this is in the next installation by just installing wpa_supplicant on its own).

I have successfully installed neofetch ...

The yellow screen was fixed by installing x11-drivers/nvidia-drivers

Okay, I have more things to try, but I was able to boot the stable kernel from a web install using dracut.

Still no ethernet, and I haven't actually configured wpa-supplicant yet, and my whole screen is yellow, but dhcpcd does find my wifi card.

Have some errands to run, but we have achieved ...

I have managed to encounter the same kernel panic while trying to web install.

I have about a dozen other things I want to try now, but that will be tomorrow.

We have wifi and sshd. No more sneakernet. That is progress.

[...] nor Ubuntu, [..] have boot media with 6.13 yet.
Yes, the newest Ubuntu 24.10 has 6.11 ... but ... Ubuntu do a lot of patches for its kernel ... so there is a chance (but I dont know) that the needed ethernet module is in there ... just try it ;-)

My friends, we have internet.

We still don ...

NeddySeagoon wrote:xevra,

There is a list of devices at /usr/src/linux/Documentation/admin-guide/devices.txt

That's a negative. There is a /usr/src/linux/Documentation folder, but there is no admin-guide within that folder.

NeddySeagoon,

Thanks for the explanation.

I can confirm that option is set.

Thank you,
Xevra

NeddySeagoon wrote:xevra,

Does /boot/amd-uc.img exist ?

Yes, it is 145Kb, according to ls.

However I like to point out your SHOULD NOT get same kernel panic. At least the line that said VFS: Cannot open root device "UUID=4643c03f-299a-4e28-b975-5c95b56244f0" or unknown-block(0,0) would have changed to VFS: Cannot open root device "PARTUUID=6f7921b9-6801-4905-9a33-506de5659ba4" or unknown ...

xevra,

That's good, almost
echo 'Loading Linux 6.13.4-gentoo-dist ...'
linux /boot/vmlinuz-6.13.4-gentoo-dist root=UUID=4643c03f-299a-4e28-b975-5c95b56244f0 ro net.ifnames=0
echo 'Loading initial ramdisk ...'
initrd /boot/amd-uc.img /boot/initramfs-6.13.4-gentoo-dist.img

I didn't see /boot ...

I suppose you do have initrd support enabled in the kernel?

NeddySeagoon,

I had "ugrd' enabled in the USE flags, so the initramfs should be enabled in the kernel. The distribution kernel requires that you use one or the other.

On my other machine, I successfully booted Gentoo using a ...

Going back to https://forums.gentoo.org/viewtopic-p-8853829.html#8853829 and that patch, it appeared in 6.13.0.
If you have RTL8125D you need 6.13.0 or newer, or to apply the patch to an older kernel, if you can.
That tells that the latest Gentoo Live media will not help.
Empirically, no, the ...

Thanks all,

I still have more things to try, but while I'm doing those things, if I ls -l /boot , the output is:
total 69124
-rw-r--r-- 1 root root 10948155 Feb 28 08:54 System.map-6.13.4-gentoo-dist
-rw-r--r-- 1 root root 10948155 Feb 28 08:16 System.map-6.13.4-gentoo-dist.old
-rw-r--r-- 1 root ...

Were you able to see boot messages? there should be some lines refer to "nvme" (I am not sure about the exact string).

Another thing you can try is to change the kernel command line from "uuid=XXXX..." to "partuuid=XXXX..." where XXXX is your /dev/nvme0n1p3's PARTUUID,

It is ok to use UUID=XXXX ...

xevra,

Thanks for confirmation.

Now we know it is on /dev/nvme0n1p3. So new question, Do your kernel support nvme? is it configured static (builtin) or module (load by initrd)

I'm using a distribution kernel, and I'm not sure how to verify that nvme is supported.

There doesn't seem to be a sys ...

xevra,

maybe read this:
https://wiki.gentoo.org/wiki/User:Pietinger/Tutorials/Confusion_with_root%3DPARTUUID%3D_and_root%3DUUID%3D
to understand why you have a kernel panic when NOT having an initramfs AND using UUID (instead PARTUUID).

Pietinger,

Thank you for pointing me at this. This is ...

xevra,

Does your initrd exist at all?
In it listed in grub?

You may have several initrds, Its common now for the CPU microcode to be in its own initrd.
They should be listed in grub in the same boot stanza.

NeddySeagoon,

When I run grub-mkconfig -o /boot/grub/grub.cfg The output I get is ...

xevra,

VFS: Cannot open root device "UUID=4643c03f-299a-4e28-b975-5c95b56244f0" or unknown-block(0,0)
The last part, unknown-block(0,0), tells that the kernel cannot see the hardware for any of your block devices. Probably because you need to load modules.

Kernel panic - not syncing: VFS ...

xevra,

can you review the UUID=4643c03f-299a-4e28-b975-5c95b56244f0?

is the value 4643c03f-299a-4e28-b975-5c95b56244f0 belong to UUID or PARTUUID?

This is the UUID (not PARTUUID) for /dev/nvme0n1p3, the root partition of my SSD.

It is a 4 Tb Crucial SSD.

When I run fdisk /dev/nvme0n1 , and ...

Okay, so the good news is that tar-ing and un-tar-ing /var/db/repos/gentoo and /var/cache/distfiles from a functional build with 6.13.4 is much faster and less of a headache than wget-ing the files and copying them over one at a time as emerges fail.

More good news is that the 6.13.4 kernel ...

Clarification: It only returns that warning while chrooted.

Edit: Further clarification: and no, it still doesn't find my ethernet devices.

Running
rc-service dhcpcd start
returns a warning:
No permission to apply cgroup settings .

This appears to be because way back when I installed the stage 3 tarball, I didn't use the "--xattrs='*.*'" flag.

I think I just ran

tar [letters] stage3*.tar.xz


I'm not sure if this is connected ...