https://bugzilla.kernel.org/show_bug.cgi?id=220705
--- Comment #32 from Lukas Wunner ([email protected]) --- Thank you! Just to double-check, this is with a stock kernel, right? I.e. without any of the custom patches from this bugzilla or elsewhere? Could you capture full dmesg output as well as full "sudo lspci -vvv" output after booting and after a suspend/resume cycle and attach it to this bugzilla so that I can double-check everything looks okay? To answer your question, the PCH SRCCLKREQ# change in the coreboot devicetree for the Eve only disables CLKREQ# at the single Root Port leading to the wifi card. Everything else remains as before. Normally what happens is, the Root Port disables the clock in L1.2 and when the wifi card has data to transfer, it signals via CLKREQ# pin that the clock shall be reinstated. The Root Port can't do that quickly enough. By disabling SRCCLKREQ# at the Root Port, it keeps the clock enabled even in L1.2. The issue was analyzed extensively inside Intel and this workaround was found to have the best performance/energy tradeoff. Apparently leaving the clock enabled consumes only little extra energy versus other approaches. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ acpi-bugzilla mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
