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The cost of a > MacBookPro7 is too much for me to acquire one to debug that issue. > > On my PowerBook G4, I also got the failure to connect, thus I should > be able to fix that problem, but getting a new kernel with the fix > onto your machine will not be easy. It might be possible to follow the arch instructions for patching the kernel https://wiki.archlinux.org/title/Kernel/Arch_build_system It takes about a day to rebuild the kernel following this procedure. > Is it possible to ssh into your machine, or to use TeamViewer? Those > questions do not need an answer now, but think about them. This is complicated by being in a CGNAT environment.  I usually do this via tailscale.  Will have to think about it. > Larry Should pio=1 qos=0 cause the problems that it does?  It if is no longer a supported configuration, perhaps it should fail more gracefully.