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I`m having a problem with some Linux distros.

My Kubuntu 18.04 LTS it`s freezing on startup SO.

I formated the computer installing Ubuntu 20.04 LTS but it`s freezing in the live-run distro, before installation.

I note the bellow error when I run:

sudo dmesg | grep iwlwifi

Stack:

[   21.314878] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
[   23.175327] iwlwifi 0000:00:14.3: Found debug destination: EXTERNAL_DRAM
[   23.175328] iwlwifi 0000:00:14.3: Found debug configuration: 0
[   23.175630] iwlwifi 0000:00:14.3: loaded firmware version 46.6bf1df06.0 op_mode iwlmvm
[   24.177863] iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9462, REV=0x318
[   24.185161] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[   24.185484] iwlwifi 0000:00:14.3: Allocated 0x00400000 bytes for firmware monitor.
[   24.230444] iwlwifi 0000:00:14.3: base HW address: 24:41:8c:bc:bb:be
[   24.333831] iwlwifi 0000:00:14.3 wlo1: renamed from wlan0
[   25.706306] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[   25.797502] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[   25.862512] iwlwifi 0000:00:14.3: FW already configured (0) - re-configuring
[   25.870243] iwlwifi 0000:00:14.3: Conflict between TLV & NVM regarding enabling LAR (TLV = enabled NVM =disabled)
[   25.872118] iwlwifi 0000:00:14.3: BIOS contains WGDS but no WRDS

I already tried:

But nothing works.

Config:

  • Dell Vostro 3480
  • BIOS: Version 1.11.0
  • SO: Trying Ubuntu 20.04 LTS or 18.04 LTS

Any suggestions to solve this problem?

1 Answer 1

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We see this clue in your dmesg:

Conflict between TLV & NVM regarding enabling LAR (TLV = enabled NVM =disabled)

I suggested that you try a driver parameter:

sudo modprobe -r iwlwifi && sudo modprobe iwlwifi lar_disable=Y

If it seems to have solved the hang issue then I suggest that you make it permanent:

sudo -i
echo "options iwlwifi lar_disable=Y"  >>  /etc/modprobe.d/iwlwifi.conf
exit

You should be all set.

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