On 15.01.2026 00:42, Milky wrote: > On Wednesday, January 14th, 2026 at 11:12 AM, Jan Beulich <[email protected]> > wrote: >> On 14.01.2026 11:58, Milky wrote: >> >>> Just wanted to update this thread to say that now another T480 user (the >>> T480 is a very similar model to my T480S) using the release builds of >>> libreboot (as of 26.01 RC1) also has the entries missing from the ACPI >>> tables. That discussion was here >>> https://codeberg.org/libreboot/lbmk/issues/394. So this confirms that I'm >>> running a standard libreboot, rather than a bad build. >>> >>> Do you think there is any way to avoid the underclocking issue with Xen on >>> such devices/firmware? >> >> >> In principle there is, but in the absence of ACPI data that means holding >> model- >> specific data in Xen. Which iirc is what the intel-pstate driver in Linux >> does >> (using ACPI info nowadays only as "auxiliary" data). But I may be wrong >> there, >> as it has been a long time since I last looked at that driver. > > In that case, would you say this is settled now? Would it make sense to > report back to the QubesOS community that librebooted T480/S will run > underclocked, due to the missing data in ACPI tables and lack of native > support in Xen? This information is important, as the device is only barely > usable.
What to suggest to the Qubes community needs to be discussed there, I think. Jan
