11.2 Installer Issues on G5

[Koakuma]

My bad, I forgot to include this:

6. Turning off SMP seems to get rid of the hangs entirely, without the
   need to set hw.ata.atapi_dma to 0, doing a verbose boot, or putting
   load on the system with yes(1). It does slow the OS down a lot, though.
   The worst affected are USB devices, where a lot of it would just
   fail to connect when plugged in with a bunch of "timed out",
   USB_ERR_TIMEOUT, or USB_ERR_STALLED errors, that would only stop when
   I unplug the device.

Attached is the /var/run/dmesg.boot of a sucessful boot with SMP
turned off.

Also, should I post those things to the bug tracker too?
The whole thing looks a lot like a bug, even though I'm not sure if it
can be reproduced easily on other machines.

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Saturday, September 22, 2018 9:46 PM, Koakuma <koachan at protonmail.com> wrote:

> Today I tried playing a bit more with the machine and found some curious
> things that might be of interest:
>
> 1.  To the best of my observation, the hang seems to happen only when
>     there's some disk activity (pre-installer booting, partitioning,
>     cheksumming and extracting the files, etc.).
>
> 2.  Booting with set hw.ata.atapi_dma=0 and boot -v as per tingox's
>     suggestion at https://sites.google.com/site/tingox/powermac_g5_freebsd
>     seems to increase the chance that I get into the installer welcome
>     page (the one with the Install/Shell/Live CD menu) successfully,
>     but it doesn't help with the hangs inside the installer itself.
>
> 3.  If I'm being lucky enough to get into the installer welcome page,
>     I can choose "Live CD" and play with the provided shell without any
>     problem... that is until I try to do something that touches the disk.
>     I even tried to run several instances of yes(1) to put some load on
>     the machine, and it runs just fine under the load.
>
> 4.  Running two instances of yes(1) along with the installer seems to get
>     rid of the hangs in the install process. Sadly, the problem is
>     still present in the installed system.
>
> 5.  The same drive (a 1 TB Seagate BarraCuda) works just fine with macOS.
>
>     Attached is the /var/run/dmesg.boot of a "Live CD" session.

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