Comment 3 for bug 1334793

------- Comment From <email address hidden> 2014-06-27 11:45 EDT-------
(In reply to comment #10)
> The message "error: no suitable video mode found." is not really an error,
> it's just GRUB saying that it didn't found any display card and will run in
> text mode. I almost sure that this is not the cause.
>
> For me, the real culprit is the "IBM client architecture reboot" support.
> Here, the last message before the reboot is "Calling
> ibm,client-architecture-support...".
>
> Linux kernel calls the method and for some reason it keeps rebooting over
> and over.

Well, I tried the procedure mentioned in comment#4 of http://wwww.ubuntuforums.org/showthread.php?t=1471399, by booting my system into rescue mode. But this did not help me either, still same behaviour!

Paulo could be right, the main culprit seems to be at this point: "Calling ibm,client-architecture-support...\"
Usually I have seen output of above command either as "done" or "not implemented", but in this case it is just ...(nil).

Is open firmware failing to validate for "client-architecture-support" here? OR something missing in pHyp support?

------- Comment From <email address hidden> 2014-06-27 11:46 EDT-------
(In reply to comment #6)
> Also, do you mind installing with Ubuntu 14.10 alpha images?
>
> http://cdimage.ubuntu.com/ubuntu-server/daily/current/utopic-server-ppc64el.
> iso

Sure, I will give this try on Monday.

Thanks!

------- Comment From <email address hidden> 2014-07-01 06:18 EDT-------
(In reply to comment #14)
> (In reply to comment #6)
> > Also, do you mind installing with Ubuntu 14.10 alpha images?
> >
> > http://cdimage.ubuntu.com/ubuntu-server/daily/current/utopic-server-ppc64el.
> > iso
>
> Sure, I will give this try on Monday.
>
> Thanks!

Well..this issue is reproducible with Ubuntu14.10 alpha as well.

FYI, here is the console log:

GNU GRUB version 2.02~beta2-10

+----------------------------------------------------------------------------+
|*Ubuntu |
| Advanced options for Ubuntu |
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+----------------------------------------------------------------------------+

Use the ^ and v keys to select which entry is highlighted.
Press enter to boot the selected OS, `e' to edit the commands
before booting or `c' for a command-line.

OF stdout device is: /vdevice/vty@30000000
Preparing to boot Linux version 3.15.0-6-generic (buildd@denneed04) (gcc version 4.9.0 (Ubuntu 4.9.0-6ubuntu1) ) #11-Ubuntu SMP Thu Jun 12 00:40:49 UTC 2014 (Ubuntu 3.15.0-6.11-generic 3.15.0)
Detected machine type: 0000000000000101
Max number of cores passed to firmware: 256 (NR_CPUS = 2048)
Calling ibm,client-architecture-support...\
Elapsed time since release of system processors: 6543 mins 52 secs
error: no suitable video mode found.

GNU GRUB version 2.02~beta2-10

+----------------------------------------------------------------------------+
|*Ubuntu |
| Advanced options for Ubuntu |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
+----------------------------------------------------------------------------+

Use the ^ and v keys to select which entry is highlighted.
Press enter to boot the selected OS, `e' to edit the commands
before booting or `c' for a command-line.

------- Comment From <email address hidden> 2014-07-01 23:45 EDT-------
This is most likely a partition firmware bug or a Linux kernel bug with the ibm,client-architecture-support call.