[SOLVED] eth0 and wlan0 are gone

[ONEEYEMAN]

Hi, ALL,
I updated my kernel and rebooted.

I didn't get any exceptions, however I lost my network interfaces and my kernel modules failed to load.

In order to fix problem 1 I tried to create a file 80-net-name-slot.rules and rebooted, but that didn't fix it. I still don't have
those interfaces.

In the past I was modifying the grub menu by adding a parameter to keep those names. Maybe I should try this?
However with GRUB2 autogenerating the configuration file it will be hard to maintain.

For the second I tried to re-run "make modules_install", and then reboot, but the modules, namely VirtualBox ones, still are not loaded.

Any help would be great.

Thank you.

[alamahant]

eth0 and wlan0

Are they maybe renamed to their original enxxx wlxxxxx names?

What does

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ip a

show?

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net.ifnames=0

is the kernel parameter that will bring them back.

but the modules, namely VirtualBox ones, still are not loaded

These are out of tree modules.
Plz use

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emerge @module-rebuild

to rebuild them
Plz make sure your /usr/src/linux symlink points to the new kernel,the initramfs--if any-- is rebuilt, and grub is updated.

[ONEEYEMAN]

eth0 and wlan0

Are they maybe renamed to their original enxxx wlxxxxx names?

Probably.
However, running "ifconfig", I can only see "lo" interface.

What does

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ip a

show?

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net.ifnames=0

is the kernel parameter that will bring them back.

but the modules, namely VirtualBox ones, still are not loaded

These are out of tree modules.
Plz use

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emerge @module-rebuild

to rebuild them

OK, will do that.

Plz make sure your /usr/src/linux symlink points to the new kernel,the initramfs--if any-- is rebuilt, and grub is updated.

I will answer the rest when I get home.

Thank you.

[mike155]

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ifconfig -a

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-a     display all interfaces which are currently available, even if down

[alamahant]

However, running "ifconfig", I can only see "lo" interface.

This is bad news.
Is it a kernel issue?
Did you change your .config?

[mike155]

However, running "ifconfig", I can only see "lo" interface.

This is bad news.
Is it a kernel issue?

No, that's expected. 'ifconfig' doesn't show interfaces that are down. 'ifconfig -a' is the required command.

[ONEEYEMAN]

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ifconfig -a

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-a     display all interfaces which are currently available, even if down

OK, this does show the ugly named interfaces.

Now all I need is to make them to e eth0/wlan0.

Thank you.

[mike155]

In the past I was modifying the grub menu by adding a parameter to keep those names. Maybe I should try this?
However with GRUB2 autogenerating the configuration file it will be hard to maintain.

Do you run grub-mkconfig to generate the GRUB config file?

There's a file /etc/default/grub. You can define default parameters in that file. On one of my machines, I have:

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GRUB_CMDLINE_LINUX="net.ifnames=0 ipv6.disable=1 init=/usr/lib/systemd/systemd acpi_enforce_resources=lax"

Another approach is to ditch grub-mkconfig - and to maintain a short, handwritten /boot/grub/grub.cfg:

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timeout=5
default=0
menu_color_normal=white/blue

menuentry 'Linux' {
   set root='hd0,msdos1'
   linux /vmlinuz root=/dev/nvme0n1p2 ro net.ifnames=0 ipv6.disable=1 init=/usr/lib/systemd/systemd acpi_enforce_resources=lax
}

menuentry 'Linux Old' {
   set root='hd0,msdos1'
   linux /vmlinuz.old root=/dev/nvme0n1p2 ro net.ifnames=0 ipv6.disable=1 init=/usr/lib/systemd/systemd acpi_enforce_resources=lax
}

menuentry 'Linux Backup' {
   set root='hd0,msdos1'
   linux /vmlinuz-Backup root=/dev/nvme0n1p2 ro net.ifnames=0 ipv6.disable=1 init=/usr/lib/systemd/systemd acpi_enforce_resources=lax
}

[ONEEYEMAN]

Hi,
OK, just tried to rebuild modules.

Got following messages:

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ERROR: Kernel configuration is invalid.
include/generated/autoconf.h or include/config/auto.conf are missing
Run make oldconfig && make prepare on kernel src to fix it
/bin/false)
warning: The compiler differs from the one used to build the kernel

However, the build continued until it errored out with:

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ccache: error: Failed to create temporary file /var/cache/ccache/......: Permission denied

I presume I shuold set up the permission to the ccache directory, but the ccache page here says it has security implications.

Thank you.

[ONEEYEMAN]

In the past I was modifying the grub menu by adding a parameter to keep those names. Maybe I should try this?
However with GRUB2 autogenerating the configuration file it will be hard to maintain.

Do you run grub-mkconfig to generate the GRUB config file?

Yes, I did.

There's a file /etc/default/grub. You can define default parameters in that file. On one of my machines, I have:

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GRUB_CMDLINE_LINUX="net.ifnames=0 ipv6.disable=1 init=/usr/lib/systemd/systemd acpi_enforce_resources=lax"

OK, thx, I will try to do that.

But I'm curious why creating that file I put in the OP didn't help....

Another approach is to ditch grub-mkconfig - and to maintain a short, handwritten /boot/grub/grub.cfg:

Code: Select all

timeout=5
default=0
menu_color_normal=white/blue

menuentry 'Linux' {
   set root='hd0,msdos1'
   linux /vmlinuz root=/dev/nvme0n1p2 ro net.ifnames=0 ipv6.disable=1 init=/usr/lib/systemd/systemd acpi_enforce_resources=lax
}

menuentry 'Linux Old' {
   set root='hd0,msdos1'
   linux /vmlinuz.old root=/dev/nvme0n1p2 ro net.ifnames=0 ipv6.disable=1 init=/usr/lib/systemd/systemd acpi_enforce_resources=lax
}

menuentry 'Linux Backup' {
   set root='hd0,msdos1'
   linux /vmlinuz-Backup root=/dev/nvme0n1p2 ro net.ifnames=0 ipv6.disable=1 init=/usr/lib/systemd/systemd acpi_enforce_resources=lax
}

[ONEEYEMAN]

mike155,
Yes, adding that fixed the issue.

Now I guess wpa_supplicant changed something because it now fails to parse the config file:

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line 8: Invalid cipher: CCMP TKIP
line 8: failed to parse pairwise 'CCMP TKIP'

which according to this is deprecated.

So, I'm going to fix the configuration file now and reboot again.

Thank you.

[ONEEYEMAN]

Hi,
Please see here.

Thank you.

[Hu]

Please post text, not images. Imgur in particular is bad, as all it can show is:

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 If you're seeing this message, that means JavaScript has been disabled on your browser, please enable JS to make Imgur work.

As for the interfaces, you were specifically asked to use ip a because it is known not to have the ifconfig behavior of hiding down interfaces.

Yes, TKIP is deprecated. Sadly, many wireless access points seem to still be configured to require it. We had quite a few threads here over the last few months from people who updated and found their wireless broken because of this. Most of them ignored the advice to fix their AP, and instead reactivated the deprecated and insecure TKIP support.

[ONEEYEMAN]

Hu,
I will check with Comcast if they drop TKIP support and if so - remove it from configuration file.

Worst case scenario - I will ask for a new router without TKIP support.

And if they don't have it - I will have no choice but recompile with the option, right?

Thank you.

P.S.: Just talk to Comcast. I will be exchanging my current modem/router with the one that don't
have TKIP.

Then all I will need is to fix the configuration.

[ONEEYEMAN]

Hu,
Right now my wpa_supplicant.conf file look like this:

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ctrl_interface=/var/run/wpa_supplcant
ctrl_interface_group=0
ap_scan=1
network={
      ssid="IgorNetwork"
      proto=RSN
      key-mgmt=WPA-PSK
#    pairwise=CCMP TKIP
       pairwise=CCMP
#     group=CCMP TKIP WEP104 WEP40
        group=CCMP WEP104 WEP40
        psk=<my_secret_passphrase>
        priority=5
}

Trying to start wpa_supplicant, I get:

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* Starting WPA Supplicant Daemon
Successfully nitialized wpa_supplicant
Line 11: Invalid cipher 'CCMP WEP104 WEP40'
Line 11: failed to parse group 'CCMP WEP104 WEP40'
Line 14: failed to parse network block
Failed to read or parse configuration '/etc/wpa_spplicant/wpa_supplicant.conf'
: CTRL-EVENT-DSCP-POLICY clear_all
* start-stop-daemon: failed to start `/usr/sbin/wpa_supplicant`
* Failed to start WPA Supplicant Daemon
* ERROR: wpa_supplicant failed to start

What else I should remove?

Also I'm using the default set of USE flagsL

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USE="crda dbus fils bs2-0 mesh readline -ap -broadcom-sta -eap-sim -eapol-test -fasteap -macsec -p2p -privsep (-ps3) -qt5 (-selinx) -smartcard -tdls -tkip -uncommon-eap-types -wep (-wimax) -wps

Now I have another Gentoo machine that I recently built and t has 0.9-r3 version, which parses just fine.

This machine has 0.10-r1 and fails to parse.

So the change was introduced very recently.

Thank you.

[figueroa]

Why not the up-to-date 2.10-r1?

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ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=wheel
update_config=1

network={
	ssid="<my_ssid>"
	psk="<my_psk>"
	proto=RSN
	key_mgmt=WPA-PSK
	pairwise=CCMP
	auth_alg=OPEN
}

This works. It was set up through the wpa_gui.

[ONEEYEMAN]

H,
Yes, that works.

The other machine is not yet updated.

Thank you.