• Status Closed
  • Percent Complete
  • Task Type Bugs
  • Category Plugins
  • Assigned To No-one
  • Operating System Another
  • Severity Low
  • Priority Very Low
  • Reported Version Daily build (which?)
  • Due in Version Undecided
  • Due Date Undecided
  • Votes
  • Private
Attached to Project: Rockbox
Opened by FLACtastic - 2010-11-13
Last edited by speachy - 2020-07-03

FS#11756 - Since using lamp plug-in the backlight and wheel light are incompatible

Sansa Fuze v2

I was using the lamp today but after a couple of minutes of use the LCD backlight went completely black until the wheel light turned off (then the backlight came back on). As soon as I moved the wheel, the wheel light came on and the backlight went off again (but the backlight then came back on again as soon as the wheel light went off again).

With much difficulty (due to the backlight going black for several seconds every time I turned the wheel) I managed to disable the wheel light permanently, and now the LCD light displays ok (although it is slightly dim - changing the brightness level makes no difference).

So the main bug is that I cannot have the wheel light AND the backlight on at the same time.

I have tried reverting back to an earlier build but the problem is still there (and I had to disable the wheel light once again to enable the backlight). The problem is also there if I use the Sansa OS (backlight only comes on when the wheel light is off). Very strange.

I don’t know if anyone can give advice, but I would suggest not using the lamp plug-in due to the risk of this bug. Thanks for reading.

Closed by  speachy
2020-07-03 03:41
Reason for closing:  Out of Date

This sounds like it could be caused by two things.
1. A register bit is set incorrectly at boot time perhaps. Have you tried re flashing a boot loader?. If thats what it takes to install rockbox on this player, I haven't checked.
or I hate to say it.
2. Hardware failure. perhaps the lamp plug in should be disabled for now, from this target, until further investigation.

This seems to be the issue discussed in:,24964.45.html

I guess this is hardware damage which cannot be reversed. The maximum brightness was limited to 12 in r30227, and there shouldn't be any danger of this problem after that.


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