Acpi Int33a0 0 Driver |work|

To understand the fix, we must first understand the problem. The cryptic code ACPI INT33A0 is a hardware identifier. ACPI stands for . It is a standard that allows the operating system (Windows) to discover and configure hardware components, as well as manage power settings (like sleep mode or hibernation).

On a Dell Venue 8 Pro tablet running Ubuntu, if pinctrl-cherryview fails to bind to INT33A0 , the device will not detect that the lid is closed, and suspend will appear broken.

BIOS may have DPTF disabled.

echo "file pinctrl-baytrail.c +p" > /sys/kernel/debug/dynamic_debug/control

zcat /proc/config.gz | grep PINCTRL_BAYTRAIL zcat /proc/config.gz | grep PINCTRL_CHERRYVIEW acpi int33a0 0 driver

The driver exposes thermal information via sysfs:

With the move to and newer platforms like Alder Lake, Meteor Lake, and Lunar Lake, the INT33A0 device is being phased out or replaced by: To understand the fix, we must first understand the problem

If you have recently opened your Windows Device Manager, scrolled through the list of hardware components, and paused at a perplexing entry labeled "Unknown Device" with the hardware ID ACPI\INT33A0\0 , you are not alone. This is one of the most common yet confusing driver issues encountered by users of HP, Dell, and other major laptop brands.