Attached patch for ixus75 will attempt to blink the AF LED early in the boot process. Let me know if it blinks when you try to start with the power button.
Not only does it blink but once it is done blinking the cam powers up normally which before it didn't. So the question is how to remove the blinking and keep the cam powering on. Can it be about some race condition?
// looks like idle cycle is required for proper shutdown MOV R3, #0x8000
Maybe it just needs a little delay. Try undoing the patch, and then in loader/ixus75_sd750/entry.S where it saysCode: [Select]// looks like idle cycle is required for proper shutdown MOV R3, #0x8000try increasing the 0x8000. I'd start by doubling it (0x10000). If that works, split the difference (0xC000), if not double it again.
I took an I65 to compare it with the I75 and with it I can even depress the power on button, hold it depressed until the camera is on, then let go. Just to point out that that's possible. With the I75 I can't do that at all as the cam won't power on if I do. Only if I let go of the button very quickly will it turn on. The same applies for A550 and A560. I'm sure someone with a different routine at using that power button might not even have noticed. Without CHDK I can turn the cameras on by press and hold if I chose to.Adjusting the delay will only increase the time you have until you need to have let go of the power putton...
When you do turn these cameras on successfully with the power button, do they go to record mode, or stay in playback?
I looked through my forum bookmarks, this seems to have been one place where I left things unfinished.Is this still relevant (the 29 untested models, the two with bugs)?
I don't remember what the two with bugs were... if it's the A550 and IXUS75_SD750 power on behavior noted in the first post, I don't think those have been fixed.
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