This firmware version has only been released
only for the new Clara HD. The download link is
http://download.kobobooks.com/firmwa...update-4.8.zip, file size 94,824,833 bytes. You will need to
rename the file from kobo-update-4.8.zip to kobo-update-4.8.11090.zip for it to work with the patching scripts.
Before starting:
1. Check
Settings > Device information to make sure your Kobo ereader is
already running firmware version 4.8.11090 (bee5052c41). If not, then you need to upgrade
before applying this patch.
2. Check that your battery is well charged.
Patching from Windows, Linux (i386/x86_64/ARM), or Mac (OS X 10.8-10.9, i386/x86_64):
1. Download and extract patch_kobo_40811090.zip (attached).
2. Download the Kobo firmware archive version 4.8.11090 for your device (See the note at the top of this post), rename it to kobo-update-4.8.11090.zip, and copy it into the 4.8.11090_source/ subdirectory that was created in step 1. (
Don't unzip the firmware archive.)
3. Read and edit all the *.patch files in the 4.8.11090_source/ subdirectory in order to: choose which patches to enable (patch_enable=`yes`) or disable (patch_enable=`no`); and to change some of the replacement values to suit your device and preferences.
4. In Windows run 4.8.11090.bat (double-click); For Linux/Mac run 4.8.11090.sh (double-click, or right-click + run, or execute 4.8.11090.sh from the command line, or drag 4.8.11090.sh into Terminal, depending on your particular OS/desktop.)
5. If there were no errors, a new 4.8.11090_target/ subdirectory will be created. Copy the KoboRoot.tgz file from this subdirectory to the .kobo directory on your ereader.
6. Safely eject and unplug the device, which will then update and restart.
To return your ereader to its original unpatched state:
1. Edit all the 4.8.11090_source/*.patch files to disable all patches (i.e. set patch_enable = `no` for every patch).
2. Repeat steps 4-6 of the procedure above.