Re: [ibm-acpi-devel] [External] Re: PrivacyGuard doesn't work even by sending ACPI commands directly

[Pellaeon L. <nfs...@gm...>]

Hi all,

I totally understand that you might have other priorities, but just
reminding you about this issue again in case you forget!

Thank you,
Pellaeon

Nitin Joshi1 <nj...@le...> 於 2025年6月20日 週五 下午4:20寫道：

> Thanks Pellaeon !
>
>
>
> Even I can reproduce it (using Ubuntu 24.04) but I can see it gets toggled
> correctly using below sysfs:
>
> cat /sys/class/drm/privacy_screen-thinkpad_acpi/hw_state
>
>
>
> Marco – Do you have any comment to debug this?
>
> Thank you very much !
>
>
>
> Thanks & Regards,
>
> Nitin
>
>
>
> *From:* Pellaeon Lin <nfs...@gm...>
> *Sent:* Thursday, June 19, 2025 10:56 PM
> *To:* Nitin Joshi1 <nj...@le...>
> *Cc:* ibm...@li...
> *Subject:* Re: [External] Re: [ibm-acpi-devel] PrivacyGuard doesn't work
> even by sending ACPI commands directly
>
>
>
> Hi all,
>
>
>
> I'd like to bring up this issue again. I just upgraded to Ubuntu 25.04,
> kernel 6.14.0-15-generic and I'm still having the same issue (the same ACPI
> call still have no effect).
>
>
>
> Thanks,
>
>
>
>
>
> Nitin Joshi1 <nj...@le...> 於 2024年9月2日 週一 下午9:42寫道：
>
> Hello Pellaeon,
>
>
>
> >> @Mark: has the team replied anything?
>
> Mark has informed me regarding this and I am yet to check this . Sorry for
> this !
>
> I will try to get hold of system and try this within this week , if I find
> AMD e-privacy guard machine .
>
>
>
> Thanks
>
>
>
> *From:* Pellaeon Lin <nfs...@gm...>
> *Sent:* Sunday, September 1, 2024 2:32 PM
> *To:* ibm...@li...
> *Subject:* [External] Re: [ibm-acpi-devel] PrivacyGuard doesn't work even
> by sending ACPI commands directly
>
>
>
> Hi,
>
>
>
> @Mark: has the team replied anything?
>
>
>
> @Marco: `proptest` on my system did not return any property related to
> privacy screen, is this normal? (I ran `proptest | grep -i privacy`, which
> returned empty result.)
>
>
>
> Thanks,
>
>
>
> Marco Trevisan (Treviño) <ma...@3v...> 於 2024年6月4日 週二 上午2:07寫道：
>
> Hi,
>
> Not sure if something changed or it is different in newer models, but
> the privacy screen feature so far has been exposed as a KMS property you
> can inspect and set with tools like proptest (in libdrm-tests package
> for what concerns ubuntu)
>
> Cheers
>
> On giu 3 2024, at 1:46 pm, Pellaeon Lin <nfs...@gm...> wrote:
>
> > Hi,
> >
> > I have a ThinkPad X13 Gen 2 AMD with PrivacyGuard. But by pressing the
> > combination key Fn+D it does not toggle the PrivacyGuard, the
> > PrivacyGuard stays on. I've tested:
> >
> > - Fn+D does toggle PrivacyGuard when I'm in the BIOS
> > - Fn+D has no effect on Ubuntu 22.10, Ubuntu 23.04, Ubuntu 23.10,
> > Ubuntu 24.04 and Fedora 40 (except Ubuntu 23.10 and 24.04, all was
> > tested using LiveUSB)
> >
> > In all of the Linux cases, I can confirm that by pressing Fn+D, the
> > status value of /proc/acpi/ibm/lcdshadow actually changes.
> >
> > I've always thought this was a Ubuntu-specific issue, until I tested
> Fedora.
> >
> > I tested this further by installing the acpi-call-dkms package on
> > Ubuntu and issues the following call:
> >
> > echo '\_SB.PCI0.LPC0.EC0.HKEY.SSSS 0x1' | sudo tee /proc/acpi/call
> >
> > It returned 0 (which should mean success), but PrivacyGuard is still
> > ON. Then I tried to call it with 0x0:
> >
> > echo '\_SB.PCI0.LPC0.EC0.HKEY.SSSS 0x0' | sudo tee /proc/acpi/call
> >
> > Also getting 0 in return. PrivacyGuard is still ON.
> >
> > Based on my limited understanding of ACPI and the kernel, at this
> > point it might be a firmware issue? (fwupdmgr shows that there is no
> > available updates) But based on my reading and understanding of
> > thinkpad_acpi.c, the particular ACPI call that I issued is also how
> > the Linux driver currently operates the PrivacyGuard feature, which
> > means the driver might also be affected by this issue. So I'm hoping
> > someone could help me debug this further, or point out anything that
> > I'm not understanding correctly.
> >
> > Thanks!
> > _______________________________________________
> >
> > ibm-acpi-devel mailing list
> >
> > ibm...@li...
> >
> > https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
>
>