diff --git a/README.md b/README.md index 462912f..abdafec 100644 --- a/README.md +++ b/README.md @@ -124,6 +124,7 @@ See code for all available configurations. | [Lenovo ThinkPad P1 Gen 3](lenovo/thinkpad/p1/3th-gen) | `` | | [Lenovo ThinkPad P14s AMD Gen 2](lenovo/thinkpad/p14s/amd/gen2) | `` | | [Lenovo ThinkPad P1](thinkpad/p1) | `` | +| [Lenovo ThinkPad P52](lenovo/thinkpad/p52) | `` | | [Lenovo ThinkPad P53](lenovo/thinkpad/p53) | `` | | [Lenovo ThinkPad T14 AMD Gen 1](lenovo/thinkpad/t14/amd/gen1) | `` | | [Lenovo ThinkPad T14 AMD Gen 2](lenovo/thinkpad/t14/amd/gen2) | `` | diff --git a/lenovo/thinkpad/p52/default.nix b/lenovo/thinkpad/p52/default.nix new file mode 100644 index 0000000..42d42dd --- /dev/null +++ b/lenovo/thinkpad/p52/default.nix @@ -0,0 +1,66 @@ +{ lib, ... }: +{ + imports = [ + ../../../common/gpu/nvidia.nix + ../../../common/cpu/intel + ../../../common/pc/laptop/acpi_call.nix + ../. + ]; + + hardware = { + nvidia = { + prime = { + intelBusId = "PCI:0:2:0"; + nvidiaBusId = "PCI:1:0:0"; + }; + }; + + # is this too much? It's convenient for Steam. + opengl = { + driSupport = lib.mkDefault true; + driSupport32Bit = lib.mkDefault true; + }; + }; + + # Sleep + # ----- + # + # The system will not stay asleep properly while on battery power or AC in + # either offload mode or sync mode. This is true whether TLP is enabled or + # disabled. When the system is told to sleep, it will appear to go into a + # sleep state, but within five minutes (and sometimes much more quickly; in + # my case especially if a USB hub is connected), it will wake itself. I + # attempted to identify what was causing this to happen, but was not + # successful. Note that this behavior is different from that of the P50 or + # P51, both of which can be convinced to sleep by changing TLP config. + # + # throttled vs. thermald + # ----------------------- + # + # NB: the p53 profile currently uses throttled to prevent too-eager CPU + # throttling. I understand throttled to have been a workaround solution at + # the time the p53 profile was created (throttled's original name was + # "lenovo_fix"). thermald would have been preferred if it worked at the + # time. + # + # I read + # https://wiki.archlinux.org/title/Lenovo_ThinkPad_X1_Carbon_(Gen_6)#Power_management.2FThrottling_issues + # as saying that thermald is fixed under the circumstance that led to the + # development of throttled given version 5.12+ of the kernel combined + # with version 2.4.3+ of thermald. At the time of this writing, the + # stable NixOS kernel is 5.15 and 2.4.9 of thermald. + # + # In the meantime, I also ran the "s-tui" program which can stress test the + # system, while eyeing up the core temps and CPU frequency under three + # scenarios: under thermald, under throttled, and with neither. None of the + # scenarios seem to have massively improved fan behavior, core temps, or + # average CPU frequency than another. The highest core temp always seems to + # hover around 90 degrees C, the lowest CPU Ghz around 3.4 on a 3.8Ghz machine. + # + # I ended up choosing throttled because subjectively, the fans seem quieter + # when it's stressed and it allows the average temps to get a degree or two + # higher when running throttled than when running in the other two scenarios, + # but still substantially under critical temp. + + services.thermald.enable = lib.mkDefault true; +}