Hi Pellaeon, On Mon, Jun 3, 2024, at 7:46 AM, Pellaeon Lin 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. > I've forwarded this to the team to check out (I don't have an X13 G2 AMD on hand myself). My understanding is that the kernel wasn't involved for the privacy FN+D feature - the BIOS handled it (and sent an ACPI notification so you could track the status). At least on the platforms I've tested this on - it just worked. I'll see what they reply. Mark _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
