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Re: Newer kernels fail to boot on a U450?

On 24/02/2021 12:29, Frank Scheiner wrote:

Hi Mark,

On 24.02.21 12:14, Mark Cave-Ayland wrote:
I then asked them to work backwards through a collection of historical
debian-ports ISOs that I own until we found one that would boot. The
results were as follows:

debian-10.0.0-sparc64-NETINST-1.iso (kernel 5.9.0-1-sparc64, grub) - FAILS
debian-9.0-sparc64-NETINST-1.iso (kernel 4.14.0-3-sparc64, SILO) - FAILS
debian-7.7.0-sparc-netinst.iso (kernel 3.2.0-4-sparc64, SILO) - FAILS
debian-6.0.4-sparc-netinst.iso (kernel 2.6.32-5-sparc64, SILO) - WORKS

Having eliminated the change of bootloader from SILO to grub as the
problem, it really seems as if something in the kernel broke booting on
a U450 between versions 2.6.32 and 3.2.0. I should add that these ISOs
all boot fine under qemu-system-sparc64 which is a U5 machine, so the
newer kernels are not completely broken.

I have checked my logs and (probably) the last time I used my Ultra
Enterprise 450 - 2018-04-21 - it was running a kernel v4.15.4:

root@e450:~# uname -a
Linux e450 4.15.0-1-sparc64-smp #1 SMP Debian 4.15.4-1 (2018-02-18)
sparc64 GNU/Linux

...successfully (incl. `openssl`, `7za` and STREAM benchmarks for half
an hour or so). And according to my netboot configuration it was booted
with GRUB - from the "[...]2.02+dfsg1-3" package. Looks like I didn't
test with any later GRUB version/package.

 From my experience, US II (and derived versions like IIi and IIe)
is/was still working well at that time, though US III and IIIi sometimes
had problems, though not sure if that is due to the processor or the
other components on the respective system boards.

Hi Frank,

Thanks for the information! Do you have a display on your U450 at all? The U450 we were trying to rescue was headless (i.e. connect via serial only) so the only differences I can see might either be the display or the fact that the boot was occurring from the CDROM rather than a local disk installation.

Next time you have the U450 fired up, I'd be interested to find out if it is possible to boot directly from the latest debian ports CDROM for comparison.



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