Re: Panic at boot on 4/330 with cgfour and cgsix

[Brad Spencer <brad%anduin.eldar.org@localhost>]

David Brownlee <abs%netbsd.org@localhost> writes:

> On Mon, 27 Jan 2025 at 13:22, foo bar <tokenalt%gmail.com@localhost> wrote:
>>
>> On Mon, Jan 27, 2025 at 4:29 AM Julian Coleman <jdc%coris.org.uk@localhost> wrote:
>> >
>> > Hi,
>> >
>> > > So as the subject says I'm having problems with these two
>> > > framebuffers. It seems to be related to the issue reported a few
>> > > months ago here.
>> >
>> > > Luckily my cgfour is still working and I've attached a dmesg from
>> > > current below. Any help would be appreciated.
>> >
>> > > 1152 x 900cpu0: data fault: pc=0xe80112e4 addr=0xfe02a000
>> > > ser=0x8002<WRITE,SZERR>
>> >
>> > I tried to test 4/300 card, but the power supply has failed in my 4/330.
>> > I'm still puzzled as to exactly what causes the size error for the P4 bus
>> > write.  Like last time, we could try by trial and error, but it might be
>> > an extended process.
>> >
>> > David's suggestion is good though - if you can check that it boots with an
>> > earlier kernel, then we could look at the differences in the P4 bus setup,
>> > which would give us a good starting point.
>>
>> I sent a reply to David yesterday but I accidentally sent it just to
>> him and not the list, here it is below.
>>
>> So I tried to boot a 4.0 kernel as it was the last one to have cgfour
>> enabled by default and it had the same panic. I suspect this driver
>> may not have been working for a very long time.
>
> It may be worth testing as far back as you can go - I think cgfour
> support arrived in netbsd-1-2. Its unlikely to work if netbsd-4-0
> didn't, but it is possible, and will be a big help if it does :)
>

[snip]

I very much agree that you would want to try going back to the NetBSD
1.x days, if you can.  I ran a 4/110 for a while with a cgfour in it and
it was able to run X and such.  Sometime between 1.x and 4.x the Sparc
VME bus was rototilled and that may be where the problem is.



-- 
Brad Spencer - brad%anduin.eldar.org@localhost