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Cake day: 2023年7月7日

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  • Sorry, all of the linux stuff is just specific to my own preferences/environment - if you’re more familiar with windows it would be best to just use that for testing. Presumably it will come with windows installed?

    If so, put some programs on a normal usb storage device and then install/run them from there.

    As for the rest:

    1. When you first turn the laptop on, at the red Lenovo splash screen, press Enter repeatedly to get into the boot menu. Once there, it’ll give you a list of options with associated keys to access them - go to “BIOS Setup - F10” (or something similar, not sure of the specifics on the X1C 6th gen). If it prompts you for a password to enter that, it’s locked.

    2. To test all the ports, plug your usb stick with the apps on it into each of the usb ports and make sure it shows up in explorer; try the same with an sd card if you have one; plug in to a wired ethernet connection and make sure you have internet access through it (disable wifi at the same time to make sure); plug headphones into the jack and make sure they work; plug into an hdmi display if you have one.

    3. To check battery health, run Command Prompt with administrator privileges, then run powercfg /batteryreport to generate a battery health report

    Good luck!


  • Personally I’d do the following:

    • boot into the bios config menu to make sure it’s unlocked (if it’s locked and they don’t have the password that’d be a dealbreaker for me)
    • boot into a live linux environment from usb and test both batteries, keyboard, trackpoint/trackpad, speakers, microphone, wifi, and all external ports (T480 has 2 usb-c, 2 usb-a, ethernet, hdmi, headset, and sd - make sure batteries charge well from both usb-c ports)
    • to check the storage health, install nvme-cli if not installed, run nvme smart-log /dev/nvme0 and check the “percentage_used” value: if it’s near 100% it might die and need replacement soon
    • to check that the vents, airflow, and cooling hardware are in good shape, install stress if not installed, run stress -c 7 to load up 7 of the 8 available cpu threads, make sure the fan spins up good and strong, and watch /sys/class/thermal/thermal_zone0/temp to make sure the cpu temperature stays under ~90-95 degrees

    On my own time later, I’d run memtest86+ overnight from bootable usb to check the memory, then install tlp and run tlp recalibrate with the laptop on the charger to recalibrate the batteries

    Edit: enjoy the new laptop! I hope it works great for you









  • There should be a section in the configuration about dhcp, which is how ipv4 addresses are given out on your network. What happens is when a device first connects to the network, it sends out a broadcast with its mac address - the dhcp server (in this case, your router/firewall) hears this, and sends back a reply allocating an address. You should be able to see a list of currently allocated addresses, and hopefully configure reservations to make those allocations permanent. To reserve an ipv4 address for a specific device, you need that device’s mac address.

    Each item on that current allocations list should have a hostname, a mac address, and an ipv4 address. If it’s not clear by the hostname which device is the tv, you can look up each mac address and deduce from there (the first part of each address is unique to a specific manufacturer).

    Once you have an ipv4 address reserved for the tv, you can set your outbound firewall rule to block it.

    Ipv6, as I mentioned, is much more complicated. It might be possible to disable it completely on your router, and that’s likely the only way to block the tv from using it, but then your whole network will lose ipv6 capability across that boundary (probably not a lot of downside to that, though).

    Good luck!


  • If your firewall can set outbound rules, and you can control DHCP on your network so that you can reliably know the TV’s IPv4 address, you can block the TV from reaching beyond the local network there with a “deny all from source address of TV” type rule.

    If your router/firewall is handling IPv6 though, it gets a lot more complicated, since the TV could have any number of addresses that change often.



  • I’d recommend a full battery calibration before running the command one more time, if you haven’t already (charge the battery fully, leave it on the charger at 100% for a while, then fully discharge until it shuts itself off, leave it for a bit, then fully recharge while off). If the calibrated values line up with a full:design ratio of ~80%, especially with a 10-year-old battery with almost 700 cycles on it, my take is that’s pretty great.

    That said, I think the best way to get an accurate feel for the health of an old battery is to put it through one full cycle of normal use and time how long it takes to die.








  • mlfh@lemmy.mltoPrivacy@lemmy.mlELI5: GrapheneOS questions
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    5 个月前
    • Your user account on GrapheneOS is just a local user account
    • GrapheneOS comes with its own camera, gallery, contacts, sms, phone, and file manager apps, a hardened fork of Chromium called Vanadium, and an app that lets you install sandboxed versions of google play services and google play store, if you so wish. Nothing else. You can install other apps using F-Droid, or by installing the google play store app.
    • GrapheneOS does not have a “cloud”, aside from the web services it uses to check for and pull new updates. If you want to sync files somewhere, you can install whatever you want (Nextcloud, Google Drive, etc)
    • F-Droid is a fine choice, and the google play store is as well, all depending on what your priorities are for your phone. I only use F-Droid and have no non-foss apps on my phone for privacy reasons, for example.
    • Running your own Nextcloud server is a great learning exercise, but it’s a big commitment of time if you’re not already familiar with linux administration, and if you want it to be secure and accessible remotely that’s even harder. Don’t let that be an impediment to getting a secure phone though - you can always keep using Google Drive for now, and then learn how to set up Nextcloud or some such as you go along.

    Good luck!