FS#9501 - severe screen corruption on H300

Attached to Project: Rockbox
Opened by Khashayar Naderehvandi (nightfrost) - Tuesday, 21 October 2008, 17:00 GMT
Task Type Bugs
Category Applications
Status Unconfirmed
Assigned To No-one
Operating System Iriver H300 series
Severity Low
Priority Normal
Reported Version Daily build (which?)
Due in Version Undecided
Due Date Undecided
Percent Complete 0%
Votes 0
Private No


I have just now installed the latest stable version of rockbox (that would be 3.0) on an iriver h340. Unfortunately, it's unusable at the moment due to some serious screen corruption. It sort of looks like this picture:, but is so much worse that it's impossible to navigate the menus. If I wait for the backlight to go off, and then press a button, the screen looks fine until I start navigating, at which point the corruption resurfaces.

I'm really excited about rockbox, but this bug is a showstopper for me at the moment.

Thanks for looking into it!

This task depends upon

Comment by Khashayar Naderehvandi (nightfrost) - Tuesday, 21 October 2008, 17:01 GMT
Here's an alleged solution I've found (which unfortunately is way over my head right now):
Comment by Nils Wallménius (nls) - Wednesday, 22 October 2008, 16:50 GMT
This issue is hardware related, the rockbox lcd driver is within specification but it seems some h300's have
lcd controllers that can't keep up, we could slow down the driver to help this problem but we wouldn't want to
slow it down too much so we need someone with a player that is affected by this to try different speeds to see
which is the fastest one that works correctly on their unit.
Comment by Khashayar Naderehvandi (nightfrost) - Wednesday, 22 October 2008, 17:28 GMT
Alright, I see.

I wish I had time to compile it myself, but unfortunately, I don't right now. However, if you (or someone else) kindly would supply me with a few different builds, I could try them one after another as soon as time allows.

Thanks, though!