yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Tab Plus] GTOJim:
I don't know if the SD had anything to do with my SOD issues. I had just removed my SD card when I saw your posting asking for the files you needed so I put the SD card back in the tab.

Using the Auto Airplane Mode helped reduce the SOD occurrences.

Yes my battery was totally dead.

I going to try Auto Airplane Mode with the SD card removed. I'm getting concerned having my battery go totally dead so many times is going to totally kill the battery.

If you don't think removing the SD card will have any impact I must just start turning the tab completely off rather than leaving it sitting idle for long periods, such as when I'm sleeping.

I'm old and need my beauty sleep. No way would I be able to function with only 2 1/2 hours of sleep. My grandfather used to say youth is wasted on youth.
[Samsung Galaxy Tab Plus] garyd9:
Go ahead and do what you need to do. I'd also suggest plugging the device into the charger before leaving it unattended for many hours. That way, if it has this issue again, at least it won't deplete the battery.

Take care

Gary

---------- Post added at 09:59 PM ---------- Previous post was at 09:53 PM ----------

For those having the wifi related SOD (if that airplane mode thing helps, it's probably wifi related) -- What brand and make wireless router are you using?

For example, I'm using a linksys e4200.

Thanks

Gary
[Samsung Galaxy Tab Plus] orb360:
Netgear WNDR3700
[Samsung Galaxy Tab Plus] jeffcavicchi:
Netgear N300 ADSL modem/router.
[Samsung Galaxy Tab Plus] GTOJim:
D-Link DIR-825
[Samsung Galaxy Tab Plus] jonsteckelberg:
SOD

I am not absolutely sure what I did but I tried autoairplane and it did not help. Tried a bunch of wifi settings and then enabled power saving in settings. Not one sod since. Again I cant say for sure what did the trick but no problems in two weeks.

Jon
[Samsung Galaxy Tab Plus] garyd9:
Are you using a memory card? What brand/size/class?

What is your "wifi sleep policy" set to?

What "power savings" options do you have enabled?

What I've managed to figure out is that the issues are consistant for those who have them and those that don't. For example, I don't have either wifi or sdcard issues, and nothing I do seems to make them happen.

It might be the case that if I were to try to connect to the wifi networks of people who DO have issues that I'd have the same issue (in which case, it's the wifi network, router, AP, and/or something local to blame.) If that is the case, then one of those people connecting to my home network wouldn't have any problems.

On the other hand, it might be possible that it's a problem with particular devices. If that's the case, then I'll never be able to repeat the problem with my tablet, and those people will have similar problems even if they connect to my network (but I wouldn't have the problem if I connected to theirs.)

In asking about AP's for only people having the wifi issue, I'm hoping to find something in common. If there's nothing in common externally, then it increases the odds that the issue is the actual tablet sample(s).

Knowing what "fixes" the issue for some people also can help to point in different directions.

Gary
[Samsung Galaxy Tab Plus] ringnutz:
I guess I got lucky like you... My device hasn't had a sod or any random reboots. I'm still running the kernel from the 5th I think. My router is a belkin play 600n with ddwrt firmware at home, no issues with that or when tethering to my phone (mt4g). Class 2 4 gig SanDisk card
[Samsung Galaxy Tab Plus] jonsteckelberg:
SOD

So yesterday I was playing a video and the tab froze up and had to hold power button reset. After which I had a sod within 30 minutes. Went in to the settings and found that power save mode had been set to off again. Changed to on and no more sod!

To answer other questions I do have an SD card in a sandisk 16g, have wifi on all the time, connected to two netgear routers.

Is there a way to get the power save mode to stay on with a hard reset?

Thanks

Jon
[Samsung Galaxy Tab Plus] GTOJim:
Gary

Here is a last_kmsg file after a SOD, caught it before my battery went dead.

No External SD card, it was removed, SD card was not a contributing factor.

Auto Airplane Mode app was running. I also turned on power saving feature, someone said it eliminated SOD issues for them.

I'm starting to think I should exchange this tablet, maybe I got one from a bad batch.

Hopefully you will find some useful information. I added zip to the extension, it's not a zip file.
[Samsung Galaxy Tab Plus] rswoods:
Just want to update:

I was having SODs frequently, sometimes several a day. Last Friday (I think) I removed the Sandisk class 2 16g card and they stopped. Earlier this week I reinstalled the card, formatted it, and have still not had a SOD.

The card does not have much data on it. Next step will be to load it up with MP3s, see what happens.

I am no longer running the "auto airplane mode" app, but am using the native "Settings/Wireless/Sleep Policy/When screen turns off". I carry the tab between home and work, obviously two different wifi networks, and have had no issues connecting to either network when waking the tab.

...it's nice having it stable.

p6210, KL1 firmware, Gary's 20120123 kernel, setCPU 200/1200, have not messed with voltages.
[Samsung Galaxy Tab Plus] garyd9:
Okay, this is something I've never seen before...

You have the following set of log entries over and over and over...

[ 1688.289509]
[ 1688.289520] Restarting tasks ... done.
[ 1688.295129] Mali: OSPMM: mali_pwr_suspend_notifier : PM_POST_PREPARE
[ 1688.295695] Mali: = clk_set_rate : 160 , 1000000
[ 1688.295732] Mali: = clk_get_rate: 160
[ 1688.295877] PM_POST_SUSPEND for CPUFREQ
[ 1688.295904] s5pv310_pm_hotplug_notifier_event: restoring pm_hotplug lock 0
[ 1688.295946] suspend: exit suspend, ret = -16 (2012-01-27 20:47:59.883284860 UTC)
[ 1688.296971] suspend: enter suspend (2012-01-27 20:47:59.884309527 UTC)
[ 1688.297004] PM: Syncing filesystems ...
[ 1688.297194] sdhci_set_ios : MMC Card ON samsung-hsmmc
[ 1688.297658] done.
[ 1688.297674] Mali: OSPMM: mali_pwr_suspend_notifier : PM_SUSPEND_PREPARE
[ 1688.331001] sdhci_set_ios : MMC Card OFF samsung-hsmmc
[ 1688.360313] PM_SUSPEND_PREPARE for CPUFREQ
[ 1688.360338] s5pv310_pm_hotplug_notifier_event: saving pm_hotplug lock 0
[ 1688.360372] Freezing user space processes ...
[ 1688.363635] Freezing of user space aborted
[ 1688.364478]
[ 1688.364489] Restarting tasks ... done.

This will be useful... I think. It certainly demonstrates a problem, and hopefully I'll be able to narrow things down a bit from it.

One of the things thats really bugging me is at the bottom of this log. It's corrupted (which often happens with the last_kmsg log), so I'm not entirely sure what is going on, but I'll be searching through the kernel to figure it out:

1689.363951] Freezing user space procerses<E0>... (elapsed 0.01 secondsi done.
[ 1689.38222u] Freezilg r<E5>maining freezabld tasks ... (elapsed 10.$9 secon$s) dOne.
[ 1699.883572] Suspending console(s) (use no_console_suspend to debug)

Thank you for sending this to me!

Gary

---------- Post added at 10:07 PM ---------- Previous post was at 10:05 PM ----------

I hate to say this, but you might actually want to ODIN it back to factory, and exchange it. It's just acting very strange. If you get another one and everything works perfectly, then we'll know that you had a defective tablet (assuming everything else is the same.)

Take care

Gary
[Samsung Galaxy Tab Plus] GTOJim:
Gary

Thanks for taking the time to trouble shoot these SOD problems people are having.

Sounds like mine might be a different problem from what everyone else is experiencing.

I've used ODIN on my phone lots of times, time to learn how to use it on my Tablet. I downloaded Kies this afternoon just incase.
[Samsung Galaxy Tab Plus] jphonggreenadik:
not yet. :)
[Samsung Galaxy Tab Plus] bdds13:
Does anybody know if SOD's are affecting the 32gb versions of the tablet? I haven't bought mine yet, but i'd like to know so i can know which one to buy. Thanks
[Samsung Galaxy Tab Plus] GTOJim:
I've got a replacement unit on the charger. I purchased my tab from Best Buy 3 weeks ago and apparently their policy is not to replace defective units after 14 days.

They replaced it after 30 minute runaround. Kind of felt sorry for the long line of people that formed behind me but it was BB doing. The CS person knew how to check for a device that was rooted etc. Even held it up to the light and sighted down every edge and surface looking for a blemish. There were none to be found as it was always in a case. He even lied that they didn't have any units in inventory.

I might leave it stock for a few days to see how it goes.

I'll update on any SOD or lack of issues.
[Samsung Galaxy Tab Plus] Entropy512:
Gary - nothing seems out of the ordinary there, other than the ret=-16 for exiting suspend. Just a bunch of suspend/resume cycles.

I don't know about .36, but on .35, the kernel dmesg timestamp clock does not run during suspend - so long gaps in time while the device is in suspend don't appear in the log.
[Samsung Galaxy Tab Plus] motohip:
A lot of you that have this issue have set CPU installed and blaming Samsung. I had setCPU on my phone and had this issue badly. This is why modified devices void the warrantee.
[Samsung Galaxy Tab Plus] jeffcavicchi:
True but... A lot of people who have had the SOD problem have not even rooted the device. The app could be put of the problem - but it can't be the whole problem.

Sent from my Galaxy Tab Plus
[Samsung Galaxy Tab Plus] orb360:
Many people have already posted that they are stock and still get SODs...

Also... Gary, I installed your kernel to help gather last_kmsg logs... but they don't show up in proc when I go to get them after a reboot... ideas?

My kernel version is

2.6.36-garyd9.20120123-g4e5b3b2
[Samsung Galaxy Tab Plus] GTOJim:
In my case I did not install SetCPU, I did not want to over clock or change any voltage settings. So we can't blame this one on SetCPU. I tried it on my phone and it worked great, didn't have a single problem.

When over clocking not all CPU's are created equal, some over clock very well and some can not be over clocked or undervolted. I never tried to do either with my tablet.
[Samsung Galaxy Tab Plus] garyd9:
The majority of the people having issues do NOT have setCPU installed. Actually, the majority are still running stock.

---------- Post added at 11:57 AM ---------- Previous post was at 11:49 AM ----------

I've never seen a sequence like that in my logs repeated over and over continuously, so I want to investigate it. Usually, if there was a successful suspect, there are a couple log entries with a timestamp of [ 0] while it's waking up... don't see that here.

It appears that it's TRYING to suspend, but something won't let it:

I also don't remember see'ing this term used in my logs (usually it's suspending, not freezing.)

Like I typed above, it's something I've not seen before, and I need to investigate it further (but not at the user's expense.)

I simply don't know at this point what's going on with that sequence.

Gary

---------- Post added at 12:02 PM ---------- Previous post was at 11:57 AM ----------

The sequence on bootup when it goes to create last_proc can be simplified as:

Check the memory space where I think a ram_console should exist... If the header is there (not too corrupted) and the data isn't too badly corrupted, drop it into that /proc/last_kmsg virtual file.

Cases when it won't be there include: the kernel used to boot previously didn't have ram console enabled (or it was enabled in a different area of memory); the tablet was powered OFF (clearing all RAM) before this kernel booted, or the memory was too corrupted to find the header and/or rebuild the ram console.

The ram console isn't a 100% sure thing, but it works often enough (usually) to be a VERY useful post-mortem tool.

Gary
[Samsung Galaxy Tab Plus] orb360:
Alrighty, well I'll try to be vigilant about throwing pokeballs at it when it appears :D
[Samsung Galaxy Tab Plus] Pete720:
For what it is worth I was having the same problem here and there but the frequency started to increase and then I saw the post about the Micro SD card possibly being a culprit. I went to format the card and it kept having a problem formatting so I removed the card and formatted it in my computer and put it back and it appeared to work ok. Well it started again so I tried again to format the SD card in the tablet but it was just having issues so I pulled the card bought a brand new one, popped it in, had the tablet format it which it did fast and without issue and since then I the random shutdown/screen of death issue has been no more. (Keeping fingers crossed.)
[Samsung Galaxy Tab Plus] Entropy512:
The Samsung 800 MHz sleep issue is well known and well documented, with a widely deployed fix that is in nearly every custom kernel for Samsung devices - trust me, the first thing I suggested that garyd9 investigate and it's been proven that it is NOT the case here. Lots of people are not using SetCPU at all, and in addition to that, I believe that the fairly common "SoD fix" for Hummingbird and Exynos devices is already in the stock 2.6.36 kernel used on the Tab 7 Plus. The 2.6.36 kernel on the Tab 7 Plus has a lot of nice improvements over Gingerbread Exynos kernels (I've already backported one of them. ;) )
[Samsung Galaxy Tab Plus] rkmj:
Gary, this is awesome. I'm glad you found this. I've been reading this thread for a while and I'm really grateful for all the work you're putting into this. I just started experiencing the SOD, but I've just been waiting for it. I had Auto Airplane Mode installed just in case, and that prevents my SOD's, so my Kingston 32GB Class 4 SD card isn't causing me any trouble, thankfully. The thing is, while reading the part of the thread about the home routers, I had a hunch that the SOD's wouldn't happen in the office.

I disabled Auto Airplane mode and had 2 in an 8 hour period while at home. When I went into the office, I didn't have a single one in the 8 hours. The wifi policy was set to "Never when plugged in," it was not plugged in either time, and I am completely stock. No root, no kernel. For the entire day the tablet was fine. As soon as I got home, when I went to unlock it, it SOD'ed. I have a Linksys E3000 N wireless router at home. I'm assuming that there is something in the way that it is broadcasting or in the connection between the tablet and the router that is causing the wifi driver to go into a loop.

I was wondering if you have any special settings on your router that might be preventing you from getting the SOD. Would you be willing to share your broadcast/channel settings, (with the exception of SSID and the other personal info,) so that I can try to reproduce them on my router and test to see if I can get rid of the miserable old SOD?
[Samsung Galaxy Tab Plus] garyd9:
Your sig file is a bit overwhelming, and outright sucks when reading this thread on my 7+. ;)

Okay.. my settings are a bit.. odd. First of all, I have DHCP disabled on my router, and instead delegate DHCP functionality to a Windows 2008 Server (SBS 2011 Std.) All "portable" devices in my house that might connect to my exchange server also have pre-assigned DHCP IP's that point to an external DNS server. (This is to work around a bug that can occur with activesync when the IP number of the exchange server changes.)

As for the e4200 router... I have the original version of this router (I see on the linksys site that there are now multiple versions, and linksys is infamous for completely revamping the internals of a router and giving it the same model as a previous version.)

setup->Basic: subnet is class C (255.255.255.0), DHCP disabled

setup->IPv6: IPv6 automatic: enabled

setup->DDNS: configured with a custom DNS (I have my own domain)

setup->MAC Addr Clone: disabled

setup->Adv Routing: Nat enabled, RIP disabled, no static routing

Wireless->Basic, 5GHz Manual, mixed mode, SSID, 40Mhz only, channel 161, SSID broadcast enabled; 2.4GHz, mixed, SSID, 20 or 40MHz, channel 11, SSID broadcast enabled.

Wireless->security: WPA2/WPA mixed mode (for both bands)

Wireless->guest: disabled

Wireless-> mac filter: disabled

Security->firewall, enabled for both ipv4 and v6. filter as much as possible from the outside world. ;)

Security->VPN Passthrough: all usually disabled, but I enable IPSec when I work from home.

Storage: not used

access restrictions (parental controls): disabled (I do that on my kid's computer with kaspersky)

Port forwarding: no comment. :)
[Samsung Galaxy Tab Plus] rkmj:
Thanks for the info and sorry for the insane sig :D Most of our settings are the same, with two exceptions:

1. DHCP

2. Fixed Channels and Channel Width

I'm going to change my channel width and channels to match yours and see if that prevents any SODs. If not, I'll try disabling DHCP and testing. At the very least, if this is successful, we'll have a workaround. I'll report back with my findings as soon as I've tested. For now, I'm off to bed so I can be at least somewhat coherent in my morning meeting. Thanks again.
[Samsung Galaxy Tab Plus] garyd9:
More information:

both the 5GHz and 2.4Ghz bands are using the same SSID.

To add more complexity to my home network, I also have two apple airport extreme routers running in a pure "AP" mode in my home. One is running both 2.4GHz and 5 GHz, and other is running only 5GHz. All these devices are on different wifi channels, and all use the exact same SSID.

At any given time from within my house, I'm able to "see" 4 of the 5 signals using a program such as "wifi analyzer" on the 7+ (or SGSII.) Usually, I can see all 5 unless I'm upstairs or in the basement.

With all that, however, it's a very tightly controlled system. The wifi is used by an ipad2, 2 iphone4's, my kid's PC (win7), a couple apple notebooks, the 7+, my SGSII, one of those cute little "airport express" things (used for pumping music), a nintendo wii, a couple amazon fires (rarely - they usually have the wifi turned off) and perhaps a couple of other "appliances" I've forgotten about.

On the wire... well... there's quite a bit of that. ;)

Take care

Gary
[Samsung Galaxy Tab Plus] orb360:
I threw a masterball this time and caught a pi-last_kmsg-achu

(Not a zip file, just renamed like the guy before me did)

It looks pretty beat up to me, but maybe it has some helpful stuff ^_^
[Samsung Galaxy Tab Plus] garyd9:
Odd. I load that up and it shows up as a bunch of glyphs. I can't read it at all.
[Samsung Galaxy Tab Plus] orb360:
When I read it in notepad it did that, but using jEdit it works.

I'm guessing one of the corrupt bytes is changing the encoding since even jEdit was giving me UTF-8 decoding errors while loading it. Here's the last little bit:

[92874.910698] UCBOPM phy_init(2)
[92874.950717] USB_PM Already power on PHY
[92875.009651] usb usb2: root hub lost power or was reset
[92875.210732] PM: resume of devices complete afta� 6s9.48y msecs
Y92x74.21q616] Seb_bat_resume st�rt
[92875.210643] sec_bat_resume end
S9287.70�902] BAT : soc(56), vcell(3804mV), curr(-288mA), temp(27.0), chg(0), full(0), rechg(0), cable(0)
[92875.714120] Restarting tasks ... done.
[92851n74&130] Mali: OSPMM: mALi[pwr_suspendOnothfier : PM_POST_PREPABE
[92875n761173] Maliz`= cHkOsep_rate :�6 , ��00000
[92875.768467] Mali: = clk_get_rate: 160
[92875.771866] PM_POST_SUSPEND for CPUFREQ
[92875.780713] s5pv310_pm_hotplug_notifier_event: restorinc pmWhgtplug loCk 0
[92875*7(8$31] suspend: exip sus`end, pet } 0 (2012-�1-31 05:08:48.0(7408611 UTC)
[9"875.802791] suspend: enter suspend (2012-01-31 05:08:48.101668321 UTC)
[92875.809577] calc_bus_utilization: 0 value is not permitted
[92875.81360] calc_bus_utilization: 0 valqe`ia nod permittdd
[92875.824096]`PM: Syncing filesystems ...
[928'5.826461] BUSLOAD is larger than 50(100)
[92875.833832] done.
[92875.834344] Mali: OSPMM: mali_pwr_suspend_notifier : PM_SUSPEND_PREPARE
[92875.914389] PM_SUSPEND_PREPARE for CPUFREQ
[92874.917�94] s5pf310_p�_ho`pluc_notibier^event: saving pm_hoTplug lock 0J[9r875.933828] Freezing user space processes ... (elapsed 0.06 seconds) done.
[92876.007019] Freezing remaining freezable tasks ... (elapsed 0.01 secondsI done.
[92836.026949] Sqspending consnle(s) (use no[conbole_sqspend to debec)

13669 Corrected bytes, 2737 unrecoverable blocks
[Samsung Galaxy Tab Plus] rkmj:
So I decided to test disabling DHCP first, since I had a feeling that wouldn't be the fix. The access points in my office are configured for DHCP, and I don't SOD there. Sure enough, we can tick that one off the list. I received a SOD about 4 hours into the test. Up next is changing the channel width. I really think that the workaround lies somewhere in the channels, whether it's setting a fixed channel or a fixed width or both. Keep your fingers crossed. I'll update as soon as I have more info.
[Samsung Galaxy Tab Plus] Zadeis:
I don't think it's the channel width. I had the channel width set to 40mhz and all of a sudden my download speed were complete crap. So I set it to 20mhz and download speeds were back to normal and the channel is set to 11.

I still got SODs but I also fixed my SODs by doing a bunch of stuff I mentioned in a previous post in this thread.
[Samsung Galaxy Tab Plus] rkmj:
was that in the 2.4 or the 5Ghz frequency?
[Samsung Galaxy Tab Plus] Zadeis:
2.4ghz frequency. I did have it on 5ghz when trying to figure out why I was getting crappy download speeds and it was fine for te 5 minutes I used it. Then I set my router back to 2.4ghz.
[Samsung Galaxy Tab Plus] rkmj:
Okay, well I'm not experiencing slowness, so there may be differences in the situations here. I think there's still a lot of merit to trying to replicate Gary's settings.

I'm still going to pursue this because this issue is too complex to be able to say that there's only one workaround. We now know, (thanks Gary,) that the wifi driver getting locked into a loop is what is causing the SOD, but we don't know what's causing the wifi driver to be locked in a loop. While we have to wait for action from Samsung (be it releasing the driver's source or correcting the malfunction themselves,) we can look to the cause of the driver lockup in order to create a suitable interim workaround.

The issue is, some people solve their SODs by making changes to the micro SD, (removing, replacing, or reformatting.) Others solve their SODs by modifying the wifi policy settings, and still others fix them by using Auto Airplane Mode. These multiple solutions indicate that there are possibly multiple causes for, (or contributors to) the wifi driver loop. This seems to be confirmed when considering that the wifi and SD share the same bus.

For those with SD issues, removing, replacing, or reformatting the SD is the workaround. For those of us without SD card problems there is Auto Airplane Mode. The thing is, it's not a perfect solution and not everyone who has a non-SD SOD is able to fix their problem with Auto Airplane Mode. (Thankfully Auto Airplane Mode solves it for me, but I am still looking for a solution that doesn't kill my downloads as soon as the screen turns off.)

Now Gary isn't getting SODs, and there are probably a large number of owners out there who also aren't getting SODs, (although I'm sure there are some out there who are and just don't realize it) I also don't get SODs when connected to the network at the office. This leads me to believe that there is something about the configuration of the wifi access point/router that is causing at least some of these to go into a loop. I may not find anything, but if I do, it will be helpful. Even if it only helps 2 people avoid the SOD, it will be worth the time.
[Samsung Galaxy Tab Plus] Zadeis:
All the power to ya. If it helps any I have a Linksys e2000 router with tomato USB installed on it. I have specific settings but I'm currently at school so I can't tell you those right now.

Edit: One thing I KNOW I specifically did when I first got my tablet was open the port for the Android Market in the routers firewall. Just a thought.