2022-07-04 23:24:35 -04:00
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{ lib, ... }:
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{
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imports = [
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../../../common/gpu/nvidia.nix
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../../../common/cpu/intel
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../../../common/pc/laptop/acpi_call.nix
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../.
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];
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hardware = {
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nvidia = {
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prime = {
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intelBusId = "PCI:0:2:0";
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nvidiaBusId = "PCI:1:0:0";
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};
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};
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# is this too much? It's convenient for Steam.
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opengl = {
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driSupport = lib.mkDefault true;
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driSupport32Bit = lib.mkDefault true;
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};
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};
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2022-07-05 17:45:16 -04:00
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# See sleep.nix inside this directory for code that allows the system to
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# sleep properly (out of the box, it will not) at the cost of battery life.
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2022-07-04 23:24:35 -04:00
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#
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# throttled vs. thermald
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# -----------------------
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#
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# NB: the p53 profile currently uses throttled to prevent too-eager CPU
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# throttling. I understand throttled to have been a workaround solution at
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# the time the p53 profile was created (throttled's original name was
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# "lenovo_fix"). thermald would have been preferred if it worked at the
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# time.
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#
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# I read
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# https://wiki.archlinux.org/title/Lenovo_ThinkPad_X1_Carbon_(Gen_6)#Power_management.2FThrottling_issues
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# as saying that thermald is fixed under the circumstance that led to the
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# development of throttled given version 5.12+ of the kernel combined
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# with version 2.4.3+ of thermald. At the time of this writing, the
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# stable NixOS kernel is 5.15 and 2.4.9 of thermald.
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#
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# In the meantime, I also ran the "s-tui" program which can stress test the
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# system, while eyeing up the core temps and CPU frequency under three
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# scenarios: under thermald, under throttled, and with neither. None of the
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# scenarios seem to have massively improved fan behavior, core temps, or
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# average CPU frequency than another. The highest core temp always seems to
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# hover around 90 degrees C, the lowest CPU Ghz around 3.4 on a 3.8Ghz machine.
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#
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# I ended up choosing throttled because subjectively, the fans seem quieter
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# when it's stressed and it allows the average temps to get a degree or two
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# higher when running throttled than when running in the other two scenarios,
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# but still substantially under critical temp.
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services.throttled.enable = lib.mkDefault true;
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}
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