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HP Pavilion - 14-al103ne Ubuntu 20.04

'top' command shows irq/126-aerdrv always running eating a lot of CPU.Top screenshot

'powertop' and 'cat /proc/interrupts' also attached. Interrupts and Powertop

I come from 16.04 where i had a similar problem with a kworker. I tried disableing gpe17 interrupt but it never went away. Upgrading to 20.04 does not seem to have helped. Only the process name has changed in 'top' from 'kworker/3:1' to 'irq/126-aerdrv'.

proc/interrupts tell me 126 is the code for IR-PCI-MSI 481280-edge. I dont know how to further find the source. This process continues even when i suspend the laptop. So suspend never works, eats up battery and CPU continuously. Any idea on solving this would be greatly appreciated.

Rahul Iyer
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1 Answers1

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AER errors

The command sudo grep -i AER /var/log/syslog* shows us that you're getting a ton of AER (Advanced Error Reporting) errors against PCI device 1d.3.

Your 1d.3 device is your...

1d.3-[05]----00.0  Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter

One workaround is to modify /etc/default/grub, find the line near the top that contains "quiet splash" and change it to "quiet splash pci=noaer" and then sudo update-grub. BUT, I don't recommend this if you've got a lot of errors, as all it does is to mask the errors from being reported. The errors still occur.

A better solution is to review /var/log/syslog*, and determine what's wrong with that device. In the case of PCI comm gear, sometimes there's a firmware problem that needs to be resolved, with updated firmware, or some other real fix.

BIOS

You have BIOS F.25. A newer BIOS exists that may resolve this problem. I can't give you the new BIOS version, as the HP web site requires the serial # of your computer. With that information, you've already been to the HP web site and viewed the new information. For any BIOS update, make sure you have good data backups before performing the BIOS update.

BIOS F.53 is available for download here.

heynnema
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