* Pandaboard boot problem
@ 2011-02-01 18:30 Jean Pihet
2011-02-04 1:53 ` Tony Lindgren
0 siblings, 1 reply; 5+ messages in thread
From: Jean Pihet @ 2011-02-01 18:30 UTC (permalink / raw)
To: linux-omap
Hi!
I have a problem with a Pandaboard hanging a few seconds after the
kernel boot, likely due to the watchdog firing.
The kernel boots fine, mounts the root FS (initramfs) and the shell
prompt works OK.
Board details: Panda A1, OMAP4430 ES2
Kernel details: l-o tree master, using the omap2plus_defconfig +
initramfs. WDOG is enabled in the config.
>From some investigation I can see that PM runtime disables the wdog
(omap_device_idle). Is that intented?
Any thought?
Thanks,
Jean
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Pandaboard boot problem
2011-02-01 18:30 Pandaboard boot problem Jean Pihet
@ 2011-02-04 1:53 ` Tony Lindgren
2011-02-14 14:01 ` Jean Pihet
0 siblings, 1 reply; 5+ messages in thread
From: Tony Lindgren @ 2011-02-04 1:53 UTC (permalink / raw)
To: Jean Pihet; +Cc: linux-omap
* Jean Pihet <jean.pihet@newoldbits.com> [110201 10:29]:
> Hi!
>
> I have a problem with a Pandaboard hanging a few seconds after the
> kernel boot, likely due to the watchdog firing.
> The kernel boots fine, mounts the root FS (initramfs) and the shell
> prompt works OK.
>
> Board details: Panda A1, OMAP4430 ES2
> Kernel details: l-o tree master, using the omap2plus_defconfig +
> initramfs. WDOG is enabled in the config.
>
> From some investigation I can see that PM runtime disables the wdog
> (omap_device_idle). Is that intented?
>
> Any thought?
Does it power down after few tens of seconds?
If so, I've seen this same issue few times after having my panda
powered off for a while, for example over the weekend.
What I've noticed is that leaving just u-boot prompt running
for a few minutes cures the problem somehow.. After that the
kernel will boot just fine.
Regards,
Tony
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Pandaboard boot problem
2011-02-04 1:53 ` Tony Lindgren
@ 2011-02-14 14:01 ` Jean Pihet
2011-02-14 14:38 ` Jarkko Nikula
0 siblings, 1 reply; 5+ messages in thread
From: Jean Pihet @ 2011-02-14 14:01 UTC (permalink / raw)
To: Tony Lindgren; +Cc: linux-omap
On Fri, Feb 4, 2011 at 2:53 AM, Tony Lindgren <tony@atomide.com> wrote:
> * Jean Pihet <jean.pihet@newoldbits.com> [110201 10:29]:
>> Hi!
>>
>> I have a problem with a Pandaboard hanging a few seconds after the
>> kernel boot, likely due to the watchdog firing.
>> The kernel boots fine, mounts the root FS (initramfs) and the shell
>> prompt works OK.
>>
>> Board details: Panda A1, OMAP4430 ES2
>> Kernel details: l-o tree master, using the omap2plus_defconfig +
>> initramfs. WDOG is enabled in the config.
>>
>> From some investigation I can see that PM runtime disables the wdog
>> (omap_device_idle). Is that intented?
>>
>> Any thought?
>
> Does it power down after few tens of seconds?
Yes
> If so, I've seen this same issue few times after having my panda
> powered off for a while, for example over the weekend.
>
> What I've noticed is that leaving just u-boot prompt running
> for a few minutes cures the problem somehow.. After that the
> kernel will boot just fine.
Unfortunately that is not helping.
I am still investigating. For the moment the pandaboard is pretty useless ;(
>
> Regards,
>
> Tony
Regards,
Jean
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Pandaboard boot problem
2011-02-14 14:01 ` Jean Pihet
@ 2011-02-14 14:38 ` Jarkko Nikula
2011-02-16 8:59 ` Jean Pihet
0 siblings, 1 reply; 5+ messages in thread
From: Jarkko Nikula @ 2011-02-14 14:38 UTC (permalink / raw)
To: Jean Pihet; +Cc: Tony Lindgren, linux-omap
On Mon, 14 Feb 2011 15:01:30 +0100
Jean Pihet <jean.pihet@newoldbits.com> wrote:
> > If so, I've seen this same issue few times after having my panda
> > powered off for a while, for example over the weekend.
> >
> > What I've noticed is that leaving just u-boot prompt running
> > for a few minutes cures the problem somehow.. After that the
> > kernel will boot just fine.
> Unfortunately that is not helping.
> I am still investigating. For the moment the pandaboard is pretty useless ;(
>
Try to heat TWL6030 a little. My board seems to suffer some soldering
fault around it and the device keeps running if I warm up the chip with
a 40 W light bulb ~1-2 cm distance.
It keeps running fine by using the Ubuntu kernel but I think reason is
that the EHCI is initialized there and the TWL draws more current and
thus heats up.
No idea why the u-boot runs fine.
--
Jarkko
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Pandaboard boot problem
2011-02-14 14:38 ` Jarkko Nikula
@ 2011-02-16 8:59 ` Jean Pihet
0 siblings, 0 replies; 5+ messages in thread
From: Jean Pihet @ 2011-02-16 8:59 UTC (permalink / raw)
To: Jarkko Nikula; +Cc: Tony Lindgren, linux-omap
Hi Jarkko,
On Mon, Feb 14, 2011 at 3:38 PM, Jarkko Nikula <jhnikula@gmail.com> wrote:
> On Mon, 14 Feb 2011 15:01:30 +0100
> Jean Pihet <jean.pihet@newoldbits.com> wrote:
>
>> > If so, I've seen this same issue few times after having my panda
>> > powered off for a while, for example over the weekend.
>> >
>> > What I've noticed is that leaving just u-boot prompt running
>> > for a few minutes cures the problem somehow.. After that the
>> > kernel will boot just fine.
>> Unfortunately that is not helping.
>> I am still investigating. For the moment the pandaboard is pretty useless ;(
>>
> Try to heat TWL6030 a little. My board seems to suffer some soldering
> fault around it and the device keeps running if I warm up the chip with
> a 40 W light bulb ~1-2 cm distance.
That works! I heated the chip with a halogen heater at ~10cm distance
and the board ran fine for 3 minutes after that.
> It keeps running fine by using the Ubuntu kernel but I think reason is
> that the EHCI is initialized there and the TWL draws more current and
> thus heats up.
That probably is the reason.
> No idea why the u-boot runs fine.
That would be nice to identify the root cause and get a SW workaround in place.
The other solution is to invest in extra heaters or a sun tan machine
in the office ;p
>
> --
> Jarkko
>
Thanks,
Jean
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2011-02-16 8:59 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-02-01 18:30 Pandaboard boot problem Jean Pihet
2011-02-04 1:53 ` Tony Lindgren
2011-02-14 14:01 ` Jean Pihet
2011-02-14 14:38 ` Jarkko Nikula
2011-02-16 8:59 ` Jean Pihet
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