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The original was posted on /r/homenetworking by /u/diet-Coke-or-kill-me on 2023-08-12 02:27:25+00:00.
I pull files from my desktop to my phone a lot, and noticed the transfers are slow and unstable lately. Did some experimenting with a 1GB file and here’s some data points I’ve found.
I noticed what frequency of wifi I’m on matters, but only for the phone. Doesn’t matter what my desktop or laptop is using. When my phone is on 5Ghz the transfer sits at 0kbps for 1 or 2 seconds. Then climbs slowly up to about 3mbps over another couple of seconds, then drops back to 0. It repeats that again and again, until it errors out or eventually finishes the transfer AGES later. When the phone is on 2.4Ghz the transfer speed sits fairly steady around 3mbps.
desktop > phone @ 5Ghz = 0-3mbps (unstable)
desktop > phone @ 2.4Ghz = ~3mbps
So then I tried pulling the same file from my pc to my laptop and got decent, steady speeds.
desktop > laptop @ 5Ghz = 10-20mbps
desktop > laptop @ 2.4Ghz = 10-20mbps
So I thought I’d try using the laptop as a middle man and lo-and-behold the speed was slowish but steady. To do this I sftp’d to my laptop and navigated to where my laptop had mounted its sftp connection to my PC.
desktop > laptop > phone @5Ghz = ~3mbps (steady)
???
hardware details:
- linksys AC1750 router
- Samsung galaxy s20 phone (Solid Explorer app for sftp client, though same behavior with FX Explorer)
- AMD desktop / Fedora 38 / OpenSSH
- Intel laptop / fedora 38 / OpenSSH