Touch Cannot change display on hacked Touch

joppybt · 08-02-2014, 04:38 PM

My Kobo Touch is on firmware 3.3.0. I have hacked it so I can use Telnet.

I start the web browser (to force Wifi) and use PuTTY to get into it. This all works fine. From Telnet I try a simple

Code:

zcat /etc/images/ghostbuster.raw.gz | /usr/local/Kobo/pickel showpic

and expect the display to change. However, nothing happens at all. No error message but also no change in the dispay.
I tried doing a killall nickel first but that does not seem to make a difference.

Am I overlooking something obvious?

tshering · 08-02-2014, 06:50 PM

In some FWs, there was a problem with screen refresh, as soon as nickel was once started. On FW 3.5.0 it works again. If you want to stay on 3.3.0, Lucas provided an executable that refreshes the screen (look for a thread that deals with screen saver for glo).
If you want to show pictures (other than ghostbuster), you should reset the orientation:

Code:

echo 0 > /sys/class/graphics/fb0/rotate

If you want to go back to nickel, reset the orientation again:

Code:

echo 3 > /sys/class/graphics/fb0/rotate

If you want to return to nickel, it is convenient if you save the nickel-screen into a file before you display your own images. If you want to use nickel again, write the saved nickel-screen to fb0, or it wlll be difficult to find the right spots to poke.

Edit: Here is the post with Lucas executable.

joppybt · 08-03-2014, 08:42 AM

At first I thought that screen-refresh does not really help:

Code:

[root@(none) ~]# killall nickel
[root@(none) ~]# zcat /etc/images/ghostbuster.raw.gz | /usr/local/Kobo/pickel showpic
[root@(none) ~]# /mnt/onboard/screen-refresh

It only cleared the screen.
But then I tried one of the others images like splash.raw.gz and it worked fine. Is the ghostbuster.raw.gz by any chance just an empty image?

I also tried upgrading to 3.5 but then I got no Wifi. Is this maybe the reason why 3.5 is not officially released for the Touch?

Anyhow, back to 3.3 now and i can continue playing.

Ken Maltby · 08-03-2014, 09:21 AM

Quote:

Originally Posted by joppybt

At first I thought that screen-refresh does not really help:

Code:

[root@(none) ~]# killall nickel
[root@(none) ~]# zcat /etc/images/ghostbuster.raw.gz | /usr/local/Kobo/pickel showpic
[root@(none) ~]# /mnt/onboard/screen-refresh

It only cleared the screen.
But then I tried one of the others images like splash.raw.gz and it worked fine. Is the ghostbuster.raw.gz by any chance just an empty image?

I also tried upgrading to 3.5 but then I got no Wifi. Is this maybe the reason why 3.5 is not officially released for the Touch?

Anyhow, back to 3.3 now and i can continue playing.

An image to insert to minimize or remove screen "Ghosting" might have such a name, and could be a clean screen or a solid screen.

Luck;
Ken

tshering · 08-03-2014, 02:39 PM

Quote:

Originally Posted by joppybt

At first I thought that screen-refresh does not really help:

Code:

[root@(none) ~]# killall nickel
[root@(none) ~]# zcat /etc/images/ghostbuster.raw.gz | /usr/local/Kobo/pickel showpic
[root@(none) ~]# /mnt/onboard/screen-refresh

It only cleared the screen.
But then I tried one of the others images like splash.raw.gz and it worked fine. Is the ghostbuster.raw.gz by any chance just an empty image?

Good that it works for you! As Ken said, ghostbuster is just to get rid of the ghosting.

Quote:

Originally Posted by joppybt

I also tried upgrading to 3.5 but then I got no Wifi. Is this maybe the reason why 3.5 is not officially released for the Touch?

Wifi is working on my Touch with FW 3.5.0.

08-02-2014, 04:38 PM	#1
joppybt Junior Member Posts: 2 Karma: 10 Join Date: Aug 2014 Device: Kobo Touch	Cannot change display on hacked Touch My Kobo Touch is on firmware 3.3.0. I have hacked it so I can use Telnet. I start the web browser (to force Wifi) and use PuTTY to get into it. This all works fine. From Telnet I try a simple Code: zcat /etc/images/ghostbuster.raw.gz \| /usr/local/Kobo/pickel showpic and expect the display to change. However, nothing happens at all. No error message but also no change in the dispay. I tried doing a killall nickel first but that does not seem to make a difference. Am I overlooking something obvious?

08-02-2014, 06:50 PM	#2
tshering Wizard Posts: 3,489 Karma: 2914715 Join Date: Jun 2012 Device: kobo touch	In some FWs, there was a problem with screen refresh, as soon as nickel was once started. On FW 3.5.0 it works again. If you want to stay on 3.3.0, Lucas provided an executable that refreshes the screen (look for a thread that deals with screen saver for glo). If you want to show pictures (other than ghostbuster), you should reset the orientation: Code: echo 0 > /sys/class/graphics/fb0/rotate If you want to go back to nickel, reset the orientation again: Code: echo 3 > /sys/class/graphics/fb0/rotate If you want to return to nickel, it is convenient if you save the nickel-screen into a file before you display your own images. If you want to use nickel again, write the saved nickel-screen to fb0, or it wlll be difficult to find the right spots to poke. Edit: Here is the post with Lucas executable. Last edited by tshering; 08-02-2014 at 07:10 PM.

08-03-2014, 08:42 AM	#3
joppybt Junior Member Posts: 2 Karma: 10 Join Date: Aug 2014 Device: Kobo Touch	At first I thought that screen-refresh does not really help: Code: [root@(none) ~]# killall nickel [root@(none) ~]# zcat /etc/images/ghostbuster.raw.gz \| /usr/local/Kobo/pickel showpic [root@(none) ~]# /mnt/onboard/screen-refresh It only cleared the screen. But then I tried one of the others images like splash.raw.gz and it worked fine. Is the ghostbuster.raw.gz by any chance just an empty image? I also tried upgrading to 3.5 but then I got no Wifi. Is this maybe the reason why 3.5 is not officially released for the Touch? Anyhow, back to 3.3 now and i can continue playing.

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