Kindle Touch, 5.1.0 and Kindlet compatibility

[LittleLui]

Hey everyone,

I updated my KT to 5.1.0 a few weeks ago, and lost my jailbreak in the process. I finally got around to re-jailbreaking, and while other Kindlets seem to work (e.g. Font Hack), my Krosswords kindlet doesn't.

I get a message "The content you're trying to open is not compatible with this Kindle. Please try to update from the settings menu. If the problem persists, pleace contact Kindle support." (translated from german, might deviate a bit from its english equivalent).

I recompiled against the 2.1 versions of the kindle's Kindlet* jars, but that didn't change anything.

Anyone got a hint for me?

regards,
LittleLui

[aditya3098]

Did you just change the actual kindlet jar or all the ones in /opt/amazon/ebook/lib?

[LittleLui]

I changed only the kindlet jar. Other kindlets (e.g. Font Hack) work.

[aditya3098]

Then try changing them all. Duh! Especially the ReaderSDK one

[LittleLui]

Originally Posted by aditya3098

Then try changing them all. Duh! Especially the ReaderSDK one

Oh my. Must have been my lack of coffee, but I completely mis-parsed your original question to mean "did you change anything in the Kindlet-JARs" as opposed to "did you replace all the Kindlet-JARs".

Of course I replaced them all (thus the glob "Kindle*" in my original post).

[aditya3098]

But you said Kindle* not ReaderSDK*

[ixtab]

@LittleLui: https://www.mobileread.com/forums/sho...5&postcount=28

[LittleLui]

Ha!
Thanks to both of you, I'm pretty sure ixtab has pointed out what I missed. I'll have to check tonight

[LittleLui]

ixtab, i've seen some more manifest entries in your xml:
<!-- FW 5.0.* -->
<attribute name="Toolbar-Style" value="none"/>
<!-- FW 5.1.* -->
<attribute name="Toolbar-Mode" value="persistent"/>
<attribute name="Font-Size-Mode" value="point"/>
Do you have any more info on those? Most of the fonts in my kindlet are really huge now, and i suspect that the font-size-mode might help with that, but setting it to "point" didn't help at all.

[ixtab]

Originally Posted by LittleLui

ixtab, i've seen some more manifest entries in your xml:
<!-- FW 5.0.* -->
<attribute name="Toolbar-Style" value="none"/>
<!-- FW 5.1.* -->
<attribute name="Toolbar-Mode" value="persistent"/>
<attribute name="Font-Size-Mode" value="point"/>
Do you have any more info on those? Most of the fonts in my kindlet are really huge now, and i suspect that the font-size-mode might help with that, but setting it to "point" didn't help at all.

Yeah, 5.1.0 fucked up pretty much everything.

The font size interpretation changed (which is exactly the reason why I made FontHack 1.3 for Firmware 5.1 only, and not below... it would simply not work on older devices, regardless of the "Font-Size-Mode" you set), and also hidden toolbars are not possible in 5.1.0. anymore. The only option you have is "transient" and "persistent". Better to have the toolbar present all the time than have it pop up every time you don't want it

[geekmaster]

Originally Posted by ixtab

Yeah, 5.1.0 fucked up pretty much everything.

They "f***ed up" the low-level eink include files too, so I have to copy the C structures directly into my native mode apps and rename them so they can coexist with previous version. Otherwise each of my native mode apps would need one version for every firmware version from 2.x to 5.0.x, and another version that would ONLY work on 5.1.0. Even amazon's apps are now version-locked to ONLY 5.1.0, or everything EXCEPT 5.1.0 (if they use the eink display). They probably broke a bunch of other stuff while they were in there mucking about.

So, I guess with your discoveries in mine, it looks like 5.1.0 is a "Total F**k Up", as they say. I asked their techs to scrap it and go back to the 5.0.0 code base. I hope they follow my advice. I am getting tired of their false "we will contact you in a couple of days" replies.

What crop of inexperienced script kiddies did amazon hire to work on this new "version" anyway?

[digory]

Originally Posted by LittleLui

*snip*
<attribute name="Font-Size-Mode" value="point"/>
*snip*

Does anybody know another value that's understood for this attribute? Thanks!

[ixtab]

"pixel"

PS: And here's how to find out such things: unzip all Kindle jars into a common directory.

This way, you can do string searches on classes:

LANG=C grep -r Font-Size-Mode java/classes
Binary file java/classes/com/amazon/kindle/kindlet/internal/install/j.class matches

Then you can open that class using your favorite decompiler (I use jadclipse) and simply click your way through to com.amazon.kindle.kindlet.ui.FontSizeMode, where you find these constants:

    public static final FontSizeMode FONT_SIZE_POINT_MODE = new FontSizeMode("point");
    public static final FontSizeMode FONT_SIZE_PIXEL_MODE = new FontSizeMode("pixel");

[digory]

Aw, cool! Thx a lot!

[MaPePeR]

might save you some time: fgrep is a better choice for patterns, that contain no patterns.
(at least wikipedia says so)