Limited Label 7CK100

tekniken för ljud.

Tekniken bakom, hur bra är ljudet, mhz ?
vilka mer tekniska termer, har ljud ?

Bengt.

 

Excellent

Interesting, thanks for the numbers! I wonder what's up with the cache-reads actually.. Without testing, that _could_ mean having swap on sdcard would actually be faster. Then again, if the system is tuned at least somewhat one would expect buffers to be flushed before resorting to actually swapping.

You're right, I talked before actually checking and I remembered wrong (it's ~64 MB). As you point out, it's not being used too much so it's not a problem, but I can change this too easily, should there be a need for that.

Thanks a lot for taking the time to write this down. I try to read up on things, but there's only so many hours on the clock. You just saved me a few I will make the changes to /data/data and /data/app you suggest.

Changing the size of partitions is quite easy really. You just change the size of the relevant partition, and the offset of the ones coming after it. They are defined in the files "parameter" (kernel cmd line) and "HWDEF". These two must match for obvious reasons, but other than that there should be no problems. You can find the files if you take the firmware upgrade file apart using afptool.exe, if you want to investigate.

(Yes, I'm trying to draft you as a co-dev Seriously though, if you would be interested I would be more than happy to help you get started, if needed. I may know my way around general Linux hacking, but a few months ago I hadn't even touched an Android device, so I definately have huge knowledge gaps.

The same offer goes for anyone willing to put the time and effort needed into this, btw)

I can see your logic, although I'm not quite sure you are right In a way, this is what Android tries to do (app "freezing") and we all know how great that work.. not I would be more than happy to be proven wrong though, and rest assure I will try your settings out, side by side with another unit if I have to!

Ok I have to save my face on this one I think I already mount all ext3 partitions with "noatime" flag, at least that was my intention. For performance, but also to cause less wear on the flash. I don't specify "nodirtime" specifically, since "noatime" enables both. (I googled it before I implemented it )

I'm considering going even further and mounting /system readonly by default since there is no real benefit of having /system r/w all the time. There are also security problems having it r/w, especially with the default file permissions.. I've fixed them up a bit (or is that only in beta2? Can't rememeber), but more needs to be done. r/w could be enabled through a (commented out) line in userhook.sh + reboot for instance.

What I really would like to see however would be a custom userapp (GUI) for stuff like this. That would open up a whole new level of tweaking without having to be comfortable in a CLI.

Again, many thanks for your interest and contributions so far! Hoping you'll stick around for a while

 

This is interesting, and I haven't seen this myself. I need to test more, but it's always gonna be trade-off between testing and breaking new ground

It almost sounds like there could be a power problem actually (surge when going online causing voltage to drop enough to crash the kernel). Are you on Kendo or LL? Have you tried doing this with the charger plugged in? Any difference at all? Try crazy things like turning the screen brightness way down or way up and see if anything changes

Thanks for reporting, and please report any further finds, or if you manage to get a log dump just as the crash happens somehow.

 

Jag vet inte exakt vad du undrar, men "ljudkortet" (DSPn) är i klass med den i en vanlig PC. 48Khz sample rate om jag minns rätt, dvs "bättre än CD" som man brukar säga (44.1KHz). Högtalaren är det som begränsar naturligtvis. Om du vill testa vilka frekvenser som går att spela upp finns det t ex youtube-videos med olika test-frekvenser.

Kopplar du den till en hyfsad stereo låter det utmärkt

 

Tack tack..
I have a Kendo. No, sorry I have no idea how get a dump when it crashes. I agree on the trade-off not a problem.
Tried with power conneted was a bit better, tried with a powered usb hub - lot better in that it did't reboot. Conclusion = powerdrop.

Now I am unable to get on the net eventhough I have connection and 3G sysmbol. I think i need to do 2 things, delete the APN's and add them again.

The other is to ask any of you that use Telia and E1750 if you could post the your network settings from Mobile Network Status (M.N.S).
Main reason for this is so TWK_ can continue the excelent work on uppgrading.

One thing I noticed when I checked my N.M.S. was that it said Network = TELE 2 AB, eventhough I am using Telia??

If its possible as a suggestion to the next rev, can you increase the time allowed between conneting to a wireless network and entering the password key, I believe its 15 -20secs just now, with long or complex keys it can be too slow. Yeah yeah - add an external keybord would be easier

Many thanks.

 

Telia och Tele2 delar master i 3G nätet så det är inget konstigt.

 

TWK, thanks for your insightful reply. When you mentioned flushing I remembered how to possibly save more battery... And that is by increasing the write flush timeouts from default values to three times more.

echo 1500 > /proc/sys/vm/dirty_writeback_centisecs;
echo 600 > /proc/sys/vm/dirty_expire_centisecs;
echo 5 > /proc/sys/vm/laptop_mode;

Laptop_mode is a knob that controls "laptop mode". When the knob is set, any disk I/O causes Linux to flush all dirty blocks. The result of this is that after a disk has "spun" down, it will not be "spun" up anymore to write dirty blocks, because those blocks had already been written immediately after the most recent read operation. The value of the laptop_mode knob determines the time between the occurrence of disk I/O and when the flush is triggered. A sensible value for the knob is 5 seconds. Default Android is 0.

I am testing this out as I speak.

System r/w or r/o via userhook is a great idea.

TWK, you've certainly proven that even humble tablets like ours can be very usable. I wish we all had money for latest models but thanks to you, I am extremly happy with mine and wouldn't trade it for any other.

Your firmware was the deciding factor.

 

I agree to 100%...moreover with a "Rolls Roy"-tablet you would never learn anything about Android and bits and pieces really.
Now we start to get a full featured tablet with Bluetooth, Speed, GPS, VPN etc... and we even understand it (more or less)!
One reason why I fell in love with my Kendo was the fact that it had very little and I thought, that the day this can be used as a Navigation tool, I think I know something about Android.
Let's keep up the good spirit!

 

Here are links for a Gingerbread to Eclair ported version of the Youtube app v2.0.26:

http://ul.to/emt639
http://www.mediafire.com/?ql6v72qia20wkh7

Works on our tablets without problems. You just have to remove the default system Youtube app from system/app/ folder and install this one.

... sorry if this was already posted. Enjoy.

 

Realized I forgot to answer this part, sorry. I'll have a look, but judging from the dmesg output this is buried in the kernel code, and I have yet to build a fully working kernel from scratch, so it may or may not happen.

Thanks for your confirming report that the issue you were having was indeed power related. Good idea with the external USB HUB. Why didn't I think of that?

@Tomo123: Great idea about tuning buffer flushing. (Again - why didn't I think of that? ) The "laptop mode" I didn't even know about, great info. Looking forward to hearing about the results!

Thanks also for the Youtube app, I'll check it out. akeake also gave me a link to one that I'll have to check out. Damn, the todo list is getting almost as wide as it's long I may have to just release 007-beta2 soon since it's working a lot better (I think) to get some testing done and take it from there. If I try to "finish" first it'll never get done I guess.

Thanks guys, those were very kind words. It's important to remember I stand on the shoulder of giants though. Others have paved the way for this - ArchOS modding community for example was a major source of info in the beginning once I had identified the hardware.

Also, great ideas and test reports from people like you and others in here over last few months is the only way we could have gotten this far. It's really cool when random people join up for a mission like this just for the hell of it

Sure, I have put more hours into this than I feel comfortable thinking about But it has been (and is!) great fun. Making hardware do more and/or different things than originally intended has always fascinated me. This time I had it easier since I knew basically where to start, having worked a lot with various Linux systems. But I had no idea it would come this far. Try flashing the original firmware some time for kicks - it feels like another tablet completely. We have done great things together in here

Word!

 

Anything for such a great person like you, Twk. Big hugs for everyone here too

As for tweaking, I am having great results with this userhook. I just removed a couple of lines ( custom swap ). Guys, do try adding this in your userhook and report back, so Twk can do his magic.

#!/system/bin/busybox sh

echo "2048,3072,6144,15360,17920,20480" > /sys/module/lowmemorykiller/parameters/minfree;

echo 1 > /proc/sys/vm/oom_kill_allocating_task;
echo 24188 > /proc/sys/kernel/sched_features;
echo 8000000 > /proc/sys/kernel/sched_latency_ns;
echo 2000000 > /proc/sys/kernel/sched_min_granularity_ns;
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs;
echo 600 > /proc/sys/vm/dirty_expire_centisecs;
echo 5 > /proc/sys/vm/laptop_mode;
echo 4096 > /proc/sys/vm/min_free_kbytes;

echo 40 > /proc/sys/vm/swappiness;

echo 0 > /proc/sys/net/ipv4/tcp_timestamps;
echo 1 > /proc/sys/net/ipv4/tcp_sack;
echo 1 > /proc/sys/net/ipv4/tcp_window_scaling;
echo 600 > /proc/sys/net/ipv4/tcp_keepalive_time;
echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout;
echo 30 > /proc/sys/net/ipv4/tcp_keepalive_intvl;
echo 5 > /proc/sys/net/ipv4/tcp_keepalive_probes;
echo 1 > /proc/sys/net/ipv4/tcp_no_metrics_save;
echo "4096 61000" > /proc/sys/net/ipv4/ip_local_port_range;
echo "4096 16384 256960" > /proc/sys/net/ipv4/tcp_wmem;
echo "4096 87380 256960" > /proc/sys/net/ipv4/tcp_rmem;

echo 256960 > /proc/sys/net/core/rmem_default;
echo 256960 > /proc/sys/net/core/rmem_max;
echo 256960 > /proc/sys/net/core/wmem_default;
echo 256960 > /proc/sys/net/core/wmem_max;

setprop net.tcp.buffersize.default 4096,87380,256960,4096,16384,256960;
setprop net.tcp.buffersize.wifi 4096,87380,256960,4096,16384,256960;

setprop wifi.supplicant_scan_interval 240;
setprop windowsmgr.max_events_per_sec 60;
setprop debug.sf.hw 1;

Did anyone find a simple solution for:

E/libagl ( 784): copybit failed (Unknown error: -1)

aLogcat loops that error, but as I understand, it's a bug in Eclair kernel itself. There is a fix, but I cannot remember where I read about it... damn!

Edit:
Here it is code.google.com/p/openetna/issues/detail?id=11

 

i have a confession to make. i have betrayed you all. just ordered a ZTE Light from Telia. And i'm giving my 7CK100 to my mother.

 

Tell your mother to register here immediately, and start tweaking her tablet!

She has a lot of catching up to do.

 

Aye, mate. It shall be done.

 

Tomo123, could you please list the commands how you created the second EXT3 partition on your sdcard.
You used 256MB swap-file, if I understood right 128MB would be enough with the memory we have on this pad?

I'm just curious to know and maybe will play with it for a while.... to get better understanding of the linux swap files. Also of reading about it on the net, of course.

BTW: I use the userhooks (note with comments, to explain what they was intended for ) and opera-settings you suggested.

 

Simplest way:

www.diy-computer-repairs.com/partition-sd-card-android-installation/

Follow step 1 and 2. Both partitions must be "primary".

 

batteri

hej ni duktia.
jag har en app bateri mix

appen medelar vad som tar kräm från batteriet, en sak är "samtal" denna platta kam man ringa från.

com.android.phone. hänvisar d
en till, kan man stänga detta eller ta bort detta så det ej drar ström? ???

Bengt

 

Ta inte bort den. Borttagning resulterar i en oändlig loop av "process not responding" felmeddelanden. Det hjälper inte att du klickar på cose eller wait. Rutan kommer tillbaka om och om och om och... Du fattar nog...

 

usb disk

Det både går och inte!

Jag har flera usb diskar, en med el försörjning utanför usb,
den fungera till plattan.

Har också 2 med elförsörjning vis usb, dessa fungerar ej till plattan,
lampan på disken lyser och
jag har en Y kabel som ger extra ström, det fungerar ej.

Jag har usb host i kryssat, plattan svarar efter en liten stund, usb disk unmonted.

kan någon lösningen??


Bengt.

 

Spänningen i plattans USB räcker inte för att driva en extern hårddisk som inte har extern strömmatning och eftersom det inte finns 2 usbuttag på plattan så kan du inte använda din Y-kabel. Lösningen blir att använda en USB-hub som har extern strömmatning och koppla hubben i plattan alternativt ta ¨ström via Ykabeln från Hubben.

Det finns tips längre bak i tråden på lämplig USB-adapter från kjell&Co för att gå från MiniUsb Hane till USB-hona. Kostar typ 49:- .