Re: [REGRESSION][BISECTED] Dell Precision 7780 wakes up on its own from suspend

Askar Safin
2025-12-05T04:01:59Z

"Mario Limonciello (AMD) (kernel.org)" <superm1@kernel.org>:
> Random thought - is this happening specifically when the lid is closed
> and you're applying "pressure" to cause the touchpad to click with the
> lid closed?

No.

I already sent script, which calls rtcwake in a loop. This script reproduces
the bug. I don't touch anything when it is running.

> If that's not it, I would check if you have the latest firmware for the
> touchpad. Unfortunately this isn't something "commonly" flashable with
> Linux like is the case with BIOS and other components.

I already downloaded "touchpad firmware update utility" and did run it
within Windows. So, yes, I have latest firmware.

> Maybe @DellClientKernel could provide some guidance.

Dell.Client.Kernel@dell.com was in CC all this time.

Also, I contacted support via web chat (and said my service tag, of course).
(My laptop comes with Ubuntu preinstalled.)
They said I have basic support only,
so they will not look into the issue too deeply. We had lengthy chat,
and in some moment they said that they will not debug OS-related issues.
I. e. if I want help with this bug, I should reproduce it without OS,
i. e. in BIOS setup utility. Of course, this is not possible, because
one cannot suspend BIOS setup utility.

I sent them link to this thread and said that the bug is probably in firmware.
But they seem to ignore this.

Also, they said I can send the laptop to them, they will try to fix it and
send it back. I don't want this.

> But yes; failing all that it's viable to make a quirk. You can follow
> any of the ones I've submitted for modeling how to do it. Here's the
> most recent one I've done.
>
> https://github.com/torvalds/linux/commit/23800ad1265f10c2bc6f42154ce4d20e59f2900e

Thank you! I will write something like this:

+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_FAMILY, "Precision"),
+ },
+ .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
+ .ignore_wake = "VEN_0488:00@355",
+ },

I will test it and then properly send (hopefully today or tomorrow).

--
Askar Safin