Hi Oma,

So I've used your rom for a couple of months now and it is very fast and stable (occasional lag is experienced but nothing major).

I have noticed one thing which is usually not a big deal at all, but it is to me due to my specific use case scenario for this tablet: I have a case for the tablet which has an integrated keyboard plugged in via USB OTG. Now, this works fine for the most part apart from one scathing problem: whenever the keyboard is plugged in and the device is locked and goes into sleep mode, the keyboard is not recognised as being plugged in after the device is awakened which means I have to plug out the USB cable and plug it back in to get it to work again.

Before anyone asks, I have tried different keyboards with the tablet which always yield the same result, and I have also tried these keyboards with different Android devices which do not have these problems. This indicates that it is a problem with the rom but I have no idea whether this is specific to your rom, Oma, or whether this is specific to the stock rom as well.

Let me know if you have any ideas as to what may be causing this problem, I'd love to be able to help you out as much as I can since I really like this tablet a lot and would love for this problem to be solved (this tablet serves as my laptop at work, see the attached picture).

Kind Regards

PS: Regarding the image, I know I am using a massive OTG adapter in the picture attached but this is not the source of the problem. Just thought I'd clarify in case anyone is wondering.

Oma7144 said
Works fine with my 55" machine. What is the problem exactly?

- Oma -

 

Hello Oma,

I have 3 issues with this tablet. I hope you can help me.

1. I also can not have signal on my Samsung tv (also tried with a Sony tv, still not working). I use an hdmi normal to micro adapter same as on your photo. Can you please send me the link where you have bought your adapter ( i hope it is possible to find on ebay). With the hdmi cable and adapter i can connect my photo camera to tv without problems.

I can not have hdmi connection with the stock 1.18 or 1.26 or your 1.5 firmware , same as an other forum user has written his problem on page 5.

2. Secondly, when i open the tablet , i see half of the screen is black (blank) until it is opened. When i press power button and make the table go in sleep mode and press again , i can get the whole screen working as it should be. This happens almost at 6-7 of 10 opening precess other times it openes as full screen on.

I think that when the tablet tries to open it gets confused as to open as 2560x1600 or 1600x2560 and such a resolution is not supported. (Orientation sensor problem??)

3. I have changed the firmware to 1.26 stock firmware and the tablet stops after the red logo. I press 10 sec. on the power button and again open the tablet. 3-4 of my 10 opening my tablet attemp is succesfull. Did i forget something when i flash the firmware ? (I used default tool and tried to understand the chineese pdf help file inside the firmare rar file. Maybe i should make complete format or reset before or during firmare flash?? By the way i have rooted the tablet with Kingo Root software from pc and updated SU program and it's binaries. 

I am sorry if i bother you with my questions. I hope yo ucan help me.

Best Regards

Oma7144 said
This are only 3 minutes. Anyway, can you pls check this app with settings "partial wakelock"?

- Oma -

 Yes it is only 3 minutes but it has this entire sequence: the keyboard plugged into the USB hub plugged into the tablet. Then, I lock the device, wait a minute, and when I wake the device, the keyboard is usually disconnected.

That is the sequence the dmesg output contains.

Also, I tried the app that you linked and, as I'm sure you suspected, the keyboard stays connected

I will continue to investigate. I have a different keyboard that is similar to the one I am using at the moment but it has a native micro USB connector and this keyboard doesn't actually disconnect! I have attached the dmesg output for the same sequence but different keyboards (with timestamps removed in order to make comparison easier) which can be compared using a tool like Beyond Compare. Again, it doesn't tell me all that much unfortunately but you may be able to see something.