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! > _______________________________________________ > > ibm-acpi-devel mailing list > > ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx > > https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
