After changing governor to performance, crashes were still appearing.
However, I traced this to be most likely caused by CPU overheating.
/var/log/syslog.* recorded messages like
omap_monitor_zone:hot spot temp 86874, and even temperatures over 100 C.
This is just a reminder to all who switch
Is it true that the fix implemented here was to disable frequency
scaling? I agree that this can be considered a workaround, but to claim
that the problem is solved is a bit far. Users expect CPU power
management to function on a modern system. Disabling it as a long-term
solution is not an option
Well last I checked, even mainline v3.9.x one needs to explicitly
cpufreq on the omap4460 to even boot to console prompt. Haven't
personally tried v3.10/v3.11/v3.12 as i've been busy with other projects
and that panda es just keeps running on v3.9.x. Long term, remember
that division was canned
** Changed in: linaro-ubuntu
Status: Fix Committed = Fix Released
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Title:
Pandaboard ES freezes with the default CPU scaling governor
No crash in performance mode after 24+ hours. This has definitely not
been fixed in the release version with the 3.2.0-1419-omap4 kernel . I
don't know about the repository builds. THIS SHOULD NOT BE MARKED AS
FIXED!! Please reactivate the bug.
I hope no one is saying that disabling frequency
I don't believe this has been fixed in the Ubuntu release. My system
crashed twice within 12 hours after I updated the kernel and switched
back to ondemand. I'm verifying now that it doesn't crash in
performance mode.
ppanish@ppanda:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
we switched to CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y since
Ubuntu-3.2.0-1405.7
** Changed in: linux-ti-omap4 (Ubuntu)
Status: Confirmed = Fix Released
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Not able to reproduce with latest kernel from TI (3.4.0-2-linaro-lt-omap
#2~ci+120825182553-Ubuntu). Marking it as fix committed for now, but
please re-open it in case of issues.
** Changed in: linaro-ubuntu
Status: Confirmed = Fix Committed
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STILL NOT FIXED？？？
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Title:
Pandaboard ES freezes with the default CPU scaling governor ondemand
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** Changed in: linaro-landing-team-ti
Importance: Undecided = Medium
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Title:
Pandaboard ES freezes with the default CPU scaling governor
** Changed in: linaro-landing-team-ti
Status: Fix Committed = Fix Released
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Title:
Pandaboard ES freezes with the default CPU scaling
** Also affects: linaro-ubuntu
Importance: Undecided
Status: New
** Changed in: linaro-ubuntu
Status: New = Confirmed
** Changed in: linaro-ubuntu
Importance: Undecided = Medium
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AFAIK this should be solved in tilt-3.4, the problem was coming from
frequency update code which should now be in good shape.
** Changed in: linaro-landing-team-ti
Status: Confirmed = Fix Committed
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Andy, do you have any update for this bug? I know Ubuntu is still using
3.2, but I remember we had to disable CPU_FREQ with 3.3 to get it to run
without freeze on 4460, so I'm not sure if the fix is already around
somewhere.
** Also affects: linaro-landing-team-ti
Importance: Undecided
I ran update-rc.d ondemand disable which renamed all links to ondemand
to K01ondemand so that they should not be run during system
initialization. However, the system is still coming up with the CPU
governor set to ondemand. I can add cpufreq-set to my rc.local, but it
would be nice to know why
For anyone that winds up here just looking for a workaround:
update-rc.d ondemand disable
apt-get -y install cpufrequtils
echo 'ENABLE=true
GOVERNOR=performance
MAX_SPEED=0
MIN_SPEED=0' /etc/default/cpufrequtils
cpufreq-set -r -g performance
After doing this, 2 Pandaboards that would freeze
here is a kernel with that patch applied:
http://people.canonical.com/~ppisati/lp971091/linux-
image-3.2.0-1412-omap4_3.2.0-1412.15~lp971091_armhf.deb
and here is the modified patch:
http://people.canonical.com/~ppisati/lp971091/omap4460-fix-lack-of-mpu-
dpll-bypass.patch
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don't use the above kernel: i got all kinds of weird hangs and panics
minutes after booting.
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Title:
Pandaboard ES freezes with the default CPU
ok, seems to really be that patch (stock 1412.15 is stable here): Andy
care to comment on that patch?
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Title:
Pandaboard ES freezes with the
Warning came too late ;-)
I tried the kernel, it seems to work with the performance setting. But it
crashes as soon as I switch to ondemand:
[ 166.025482] Unable to handle kernel paging request at virtual address
00011ecb
[ 166.031646] pgd = ec0e8000
[ 166.031646] [00011ecb] *pgd=
[
I have reproduced assorted kernel panics. I am investigating.
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Title:
Pandaboard ES freezes with the default CPU scaling governor ondemand
To
** Changed in: linux-ti-omap4 (Ubuntu)
Importance: Undecided = Medium
** Tags added: kernel-da-key
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Title:
Pandaboard ES freezes with the
Andy, thanks for your effort. I think I'm not experienced enough to
apply this patch and get the kernel running on my PandaES. Is there any
cookbook-style hint available anywhere?
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I already found out the cause for this on the new tree and fixed it.
I'll prepare a patch on tilt-3.1 with the same fix.
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Title:
Pandaboard ES
Please try the attached... something is wrong with my boot setup atm,
tilt-3.1 with or without this patch blows up in per_cpu code early in
boot so I can't test it. It's either boot pieces or toolchain, I moved
to Linaro 4.6.3 toolchain, which works OK on 3.3 stuff.
** Patch added:
** Tags added: patch
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Title:
Pandaboard ES freezes with the default CPU scaling governor ondemand
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-ti-omap4 (Ubuntu)
Status: New = Confirmed
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do you have the pvr-sgx driver installed? can you cutpaste the output
of `lsmod`?
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Title:
Pandaboard ES freezes with the default CPU scaling
No, I did not add any graphics driver to the default Beta2 load. Here's the
lsmod:
Module Size Used by
joydev 9848 0
usbhid 37879 0
cpufreq_powersave 1020 0
cpufreq_conservative 6707 0
cpufreq_ondemand7344 0
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Title:
Pandaboard ES freezes with the default CPU scaling governor ondemand
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