u/lukmly013 💾 (lemmy.sdf.org)

I like computers, trains, space, radio-related everything and a bunch of other tech related stuff. User of GNU+Linux.
I am also dumb and worthless.
My laptop is ThinkPad L390y running Arch.
I own RTL-SDRv3 and RSP1 clone.

SDF Unix shell username: user224

  • 15 Posts
  • 733 Comments
Joined 2 years ago
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Cake day: June 17th, 2023

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  • I connect to mine with a USB serial adapter, since my laptop doesn’t have one built-in, which I wish it did. Software-wise, I just use screen because I am lazy to use something like Minicom.

    Just don’t set any low baud rate for Linux. It will wait for logs to be printed out while booting. Though perhaps you can reduce the loglevel, I haven’t tried that. I’ve tried 300 baud for fun, and that wasn’t fun. I think it was over half an hour to boot up just waiting for logs to print.

    I honestly don’t remember what I did, but this lies in my /etc/default/grub and looks relevant:

    GRUB_CMDLINE_LINUX="console=ttyS1,115200"
    GRUB_TERMINAL_INPUT="console serial"
    GRUB_TERMINAL_OUTPUT="gfxterm serial"
    GRUB_SERIAL_COMMAND="serial --unit=1 --speed=115200"
    

    Also it’s useful to then set width, height and terminal type. I think terminal type is in $TERM , and size is set with stty, but I am not sure. It’s been a while.

    You may also need a “null modem adapter” to reverse RX and TX, but oddly enough, that actually makes it not work with my adapter, despite it also working when directly connected to a switch. Maybe it can figure out which end it’s supposed to be? Dunno.







  • More battery drain with anti-skip.
    The tables have turned later on. The anti-skip would extend battery life. It would get enough buffer allowing the CD to spin-down and then it would spin back up when needed. This time could be even longer if playing MP3.

    For example, my Panasonic SL-CT520 does 100 second “anti-skip” (at this point it’s not really just anti-skip), and with MP3 cites up to 155h of playback time. Unfortunately, the unit I have can’t play CD-RW (it is mentioned in the manual) which probably means a degraded laser.

    But even with CDDA, my Sony D-EJ000 cites 16 hours with anti-skip and only 11 hours without anti-skip. Unfortunately, in this case the anti-skip also reduces audio quality slightly since it uses lossy compression, so I keep it off.
    At least I think that’s what the manual is trying to say

    To enjoy high quality CD sound, select “G-off”.