O2 Joggler Forum

Hi,

I just got a joggler, and whenever it's powered on the screen is corrupted. The corruption persists (varying in form, but mostly ugly scanlines obscuring various parts of the display) until I boot something that actually initialises the display for graphics; the EFI bootloader, grub, and any text-mode linux that I start are corrupted.


Occasionally it doesn't do it and everything works fine, but there's no particular pattern to it, and it's usually corrupted.

Is this some known problem? Is there anything I can do about it? It makes it annoying to experiment with booting different things, since the screen is variably useless until you actually get X running :/

I also have this, seems to be when the joggler starts from cold for me, but all I do is start the o2 os then turn it off lol, seems to fix it

This seems to be pretty commonplace - I've seen Jogglers that never do this, Jogglers that do it every time without fail and Jogglers that only do it when cold and don't have an issue once they've warmed up. When I recently bought some faulty units on eBay, straight out of the courier's box all of them had the issue. However, the next day when they were room temperature, none of them had screen corruption.

It's not restricted to OpenPeak-booting Jogglers either; one I have that does it every time has the O2 branded EFI.

I need to swap a display on a Joggler soon, so I may be able to confirm if it's an issue with the logic board or the display unit.

Could it not just be the fact the display does not like being cold? I used to have a tv that I had to leave on for 5 minutes before the picture came up, that was the same thing lol.

Yeah, after more experimenting it appears to work okay once you leave it in the O2 OS for a while and the device is a bit warmer. I can live with that

Thanks for the info, folks.

I now keep my joggler near a side lamp, sounds silly but the heat from the lamp stops the joggler from being too cold lol

danfoshizzle wrote:I now keep my joggler near a side lamp, sounds silly but the heat from the lamp stops the joggler from being too cold lol

Hehe. Well, the climate is warmer where it was designed.
Here's my evidence from first boot this morning. You can see the OS booting, while the O2 logo and screen corruption stay present. At the bottom you can see it's just starting to fade away in blotches.

A few minutes later and all is well.

That o2 screen is identical to what my openpeak does when its a little chilly, poor thing.

Decided to take joggler to work today and experienced this corrupted screen thingy first hand :0) didn't boot up till 1.30pm in van so it wasn't that cold .
It was a bit of a windows blue screen of death moment and i thought that it was goosed but alas it booted no problem .
This has never happened before at home so must just be down to the cold :@)
Happy Joggling

So I just took delivery of my fleabay 35 pound buy it now joggler, I was well chuffed with my buy, however it has this issue detailed above, a sort of washed out hazy white screen on boot but then fine after boot finishes.
The same is true with both stock os and booting of a USB stick (I tried Linux mint)
Tried it at the same time / temperature as my other joggler and only this new one has this issue.
As an aside I have also replicated this issue on my good joggler taking it to work on a cold morning.
What I would like to know is do others have this issue and if so could it be a sign that the jog is on its way out?
Or could a reflash fix it?
Hope I don't have to return my bargain

hawsey wrote:What I would like to know is do others have this issue and if so could it be a sign that the jog is on its way out?
Or could a reflash fix it?
Hope I don't have to return my bargain

I wouldn't return it!

I don't think it's a sign that the Joggler is on it's way out, rather that there's a component that has fine tolerances or behaves a little oddly when there is no 'full' driver to configure it correctly. It seems reasonably common and nobody here has complained that their Joggler has died because of it.

As an aside, the Joggler you can see in my earlier post had the problem every morning, without fail. It also had a dodgy touchscreen digitiser, so I swapped the screen with a replacement I took from a Joggler with a dead logic board. The problem vanished and has never returned, so I believe the issue is with one of the components on the screen panel, rather than the main board.

Cheers Roobarb

Oh I found the topic, I can confirm my Joggler is really similar!

Part of the addiction to using the Joggler is never shutting it off. So that said if its always you will never notice it.