[parisc-linux] some bugs

Tue, 9 Apr 2002 18:15:52 +0100 (IST)

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Hi,

I just played a little with my C240 (serial console and X11 forwarding),
and decided to install a 64bit kernel just for fun (and to help you
testing them). I know that 64bit doesn't make sense at all (at least
not in the near future, since there is no 64bit userland support and I guess
not many applications would profit from it even if there was one).
Needless to say that I'm running a 32bit kernel again ;)

on all 2.4.x kernels tested so far
==================================
- the 32bit kernel shipped with the 0.9.3 iso (IIRC 2.4.9)
- 2.4.18-pa4-32bit
- 2.4.18-pa5-32bit
- 2.4.18-pa14-32bit
- 2.4.18-pa14-64bit

I've seen following issues:

- leds don't seem to work (i.e. no heartbeat or other leds on or blinking - or
  is my hp really so idle ?)
  This is just with the latest 2.4.18-pa14 kernels (2.4.18-pa5-32bit worked,
  but IIRC not perfectly)

- 100Mbit is not supported properly (full-duplex support is always
  recognized, but 100Mbit just occationally).
  Of course it's a full 10/100Mbit SWITCH (no hub), and I checked the cables
  Moreover I just have 100Mbit network devices plugged into the switch.

- the 'poweroff' command doesn't work, it just shutdowns the machine, but does
  no real poweroff. (AFAIK 'poweroff' is a synonym for 'shutdown -p now', isn't
  it ? this doesn't work either).
  The powerkey works as expected (including powering off the workstation)
  with 32bit kernels.

for kernel 2.4.18-pa14-64bit (32bit PDC):
========================================
- if fs type "auto" is set for a ext3 partition, the kernel detects the /, but
  the mount command (in the bootscript) fails to detect the fstype. Setting the
  fstype entry in /etc/fstab to "ext3" or "ext2" fixes the problem.
  Since 'mount -a' fails to detect the fs type, it won't remount /
  in read-write mode, and thus the system won't boot correctly.

  But "auto" in /etc/fstab works with the corresponding 32bit kernel

- crashme is effective (example settings, after a few minutes kernel crashed,
  even MagicSysRq didn't work. It didn't seem to 'work' on 2.4.18-pa5-32bit,
  I didn't try with the 2.4.18-pa14-32bit kernel)

- once I got a kernel oops at interrupt_stack() at boot up (attached to mail),
  but eveything seemed to work. I didn't get any more kernel oops.

- shutdown&poweroff when hitting powerkey does not work (it just switches off
  the workstation immediately; it works properly on the corresponding 32bit
  kernel and 2.4.18-pa5-32bit)

- if I compile in support for STIcon/STIfb, it doesn't switch the output
  to the console (after the 'branching to kernel entry point' message).
  At least I waited for quite some time, and I didn't seem to go on.
  I didn't compile in support for STIcon/STIfb for the 32bit kernel,
  therefore I can't tell whether there is the same problem or not.
  STIcon/STIfb works with 2.4.18-pa5-32bit. Well, my FX/2 card isn't supported
  for fb, but at least the kernel doesn't hang with that kernel.

some things that work on both 32/64bit kernel (2.4.8-pa14), probably not worth
to mention:

- tmpfs, ext3, ext2, iso9660
- harmony audio
- serial console, MagicSysRq over serial console
- of course scsi, ethernet and running 32bit applications
- ventilators ;)

N.B. I didn't try the latest modutils, in which the pa8000 cpu issue is fixed.
therefore I didn't compile any modules
BTW, i use the tulip driver for ethernet. Is it also possible (and safe)
to use the generic DEC driver ?

greetings max

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