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 <nfsmwlin@xxxxxxxxx>
Sent: Sunday, September 1, 2024 2:32 PM
To: ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: [External] Re: [ibm-acpi-devel] PrivacyGuard doesn't work even by sending ACPI commands directly
@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.)
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 <nfsmwlin@xxxxxxxxx> 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!
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>
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>
> ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx
>
>
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