What's changed? Later kernels fail to boot...

[keylevel]

I'm building from source (Yocto Project) and the latest kernels just give me the 'four-colour' screen.

1. I'm using the latest firmware (raspberrypi/firmware@9308c7e);
2. 3fc65f9 is the last kernel that I can get to run.

Is there something new that I need to add to config.txt or similar?

[popcornmix]

So if you use prebuilt kernel does it boot, or is it only your own build that fails?
So this works:
3fc65f9 Explicitly set usb host channels to 8, as in the spec
And this fails?
cc5758b Add hfs/hfsplus modules

Well you can see what's changed, and there's nothing controversial there.

[keylevel]

Yes, that's correct. The fact that nothing significant has changed is what's confusing me. Build environment is exactly the same in each case.

[keylevel]

What version of GCC are you using / do you recommend? I've been using 4.6.3. Someone else using 4.7 has had not been able to get any builds to run.

[popcornmix]

I use this:
https://github.com/raspberrypi/tools/tree/master/arm-bcm2708/linux-x86

[keylevel]

Thanks. I've tried building using the same version as that (4.5.1), but still no luck. Is this toolchain based on a clean 4.5.1, or are there patches as well? I didn't spot a source tree, so it looks as it it's unmodified ?

[keylevel]

Looks like this is down to compression.

Compressed images sometimes work (most recent commit does), some don't.

Uncompressed images always work.

[keylevel]

Fixes to restore booting of compressed images have solved this. Thanks ;-)