Queries about K4NT

geekyworld · 05-14-2013, 10:07 AM

Hi,

I have these queries regarding K4NT with ads. I'll be very thankful if you can answer them:

1. How to invert the display? (white text on black background)

2. Where is the fonts folder located?

3. Where are the default, pre-loaded screensavers (not ads) located?

4. How to change the timezone without connecting to Wi-Fi? (I have no access to Wi-Fi whatsoever)

Thanks.

twobob · 05-14-2013, 09:44 PM

1) echo "19 8" >/proc/eink_fb/update_display (inverted display)

2) [root@kindle root]# ls /usr/java/lib/fonts

Spoiler:

(There are other folders pertaining to fonts but I think you mean that one)

3) ls /opt/amazon/screen_saver/600x800

Spoiler:

(There are other pngs kicking about but I think those are the ones you mean)

Here's some more...

Spoiler:

4) [root@kindle root]# cat /etc/TZ

Quote:

UTC

Also THIS POST may help you

(as an aside.. from a backup of a 3 I noted the following)
cat /home/me/Desktop/K3FATBACKUP/etc/TZ

Quote:

MST7MDT

Hope that is everything.

geekyworld · 10-10-2013, 10:06 AM

Thanks a lot twobob. Apologies for the late reply. I tried inverting the display today and it works.

What is the command to switch back to the default black on white display? Also, what do the arguments 19 & 8 stand for?

twobob · 10-10-2013, 06:50 PM

hmm... Im trying to remember. it's been a while.

The 19 and 8 are values that can be found in the source code.
damned if I can remember what they were.

19 was mode selection perhaps in this context and 8 was the "inversion" special type, but don't hold me to that...

https://wiki.mobileread.com/wiki/Framebuffer_for_Kindle for other values.

IIRC it had something to do with the command version and waveform versions availble on each revision of device

on the k3
_EINK_UPDATE_DISPLAY_WHICH=18
_FX_UPDATE_PART=0
_FX_UPDATE_FULL=1
_FX_UPDATE_FAST=2
_FX_UPDATE_SLOW=3 - full refresh with "flash"

_FX_BUFFER_LOAD=99
_FX_DISPLAY_PART=100
_FX_DISPLAY_FULL=101

on the DX:

_FX_UPDATE_PART=0
_FX_UPDATE_FULL=1
_EINK_UPDATE_DISPLAY_PART=1
_EINK_UPDATE_DISPLAY_FULL=2
_EINK_UPDATE_DISPLAY_AREA=3
_EINK_UPDATE_DISPLAY_FX=7

see also https://www.mobileread.com/forums/sho...d.php?t=142848
and
http://pastebin.com/tzFsFWrg for k3 like examples

Hope that helps somewhat

geekyworld · 10-11-2013, 02:49 AM

After tinkering for some time I think I've found the solution.

To switch back to normal (black on white) display:

Code:

echo "19 9" >/proc/eink_fb/update_display

Thanks.

twobob · 10-11-2013, 07:22 AM

cool.

05-14-2013, 10:07 AM	#1
geekyworld Enthusiast Posts: 32 Karma: 31582 Join Date: Apr 2013 Device: kindle	Queries about K4NT Hi, I have these queries regarding K4NT with ads. I'll be very thankful if you can answer them: 1. How to invert the display? (white text on black background) 2. Where is the fonts folder located? 3. Where are the default, pre-loaded screensavers (not ads) located? 4. How to change the timezone without connecting to Wi-Fi? (I have no access to Wi-Fi whatsoever) Thanks.

10-10-2013, 10:06 AM	#3
geekyworld Enthusiast Posts: 32 Karma: 31582 Join Date: Apr 2013 Device: kindle	Thanks a lot twobob. Apologies for the late reply. I tried inverting the display today and it works. What is the command to switch back to the default black on white display? Also, what do the arguments 19 & 8 stand for? Last edited by geekyworld; 10-10-2013 at 12:19 PM.

10-10-2013, 06:50 PM	#4
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	hmm... Im trying to remember. it's been a while. The 19 and 8 are values that can be found in the source code. damned if I can remember what they were. 19 was mode selection perhaps in this context and 8 was the "inversion" special type, but don't hold me to that... https://wiki.mobileread.com/wiki/Framebuffer_for_Kindle for other values. IIRC it had something to do with the command version and waveform versions availble on each revision of device on the k3 _EINK_UPDATE_DISPLAY_WHICH=18 _FX_UPDATE_PART=0 _FX_UPDATE_FULL=1 _FX_UPDATE_FAST=2 _FX_UPDATE_SLOW=3 - full refresh with "flash" _FX_BUFFER_LOAD=99 _FX_DISPLAY_PART=100 _FX_DISPLAY_FULL=101 on the DX: _FX_UPDATE_PART=0 _FX_UPDATE_FULL=1 _EINK_UPDATE_DISPLAY_PART=1 _EINK_UPDATE_DISPLAY_FULL=2 _EINK_UPDATE_DISPLAY_AREA=3 _EINK_UPDATE_DISPLAY_FX=7 see also https://www.mobileread.com/forums/sho...d.php?t=142848 and http://pastebin.com/tzFsFWrg for k3 like examples Hope that helps somewhat Last edited by twobob; 10-10-2013 at 07:01 PM.

10-11-2013, 02:49 AM	#5
geekyworld Enthusiast Posts: 32 Karma: 31582 Join Date: Apr 2013 Device: kindle	After tinkering for some time I think I've found the solution. To switch back to normal (black on white) display: Code: echo "19 9" >/proc/eink_fb/update_display Thanks.

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10-11-2013, 07:22 AM	#6
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	cool.

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