Just so I'm absolutely clear: both your HP Pavilion notebook and your ASUS EEEPC 904ha don't shutdown with antiX-14-a3 but work fine with everything earlier. BTW: Sometimes my laptop takes about 10 seconds between when it says"Ready to xxxx" and when it actually does xxxx. I hate to ask but is it possible you just need to wait longer?
After the dreaded"wait test", there is another test you can try. Right before you shut down, copy /etc/init.d/debian/{sendsigs,umountfs} to /etc/init.d/. This should revert to the standard Debian shutdown process. If it works then we have isolated the problem to the busybox shutdown app. Of course, don't run persist-save after you do the copy unless you want to permanently disable our live shutdown process.
As for the intel graphics driver, here is a
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url was:"https://lkml.org/lkml/2014/6/30/178"
linktext was:"similar regression posted in the LKML"
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(Linux Kernel Mailing List).
I looked at their patch and it is already in the 3.17 kernel source. I am pretty sure this patch is what made the driver work on my ValleyView Gen3 chip set. There have been a lot of other changes so I don' t think that patch is related to your problem but maybe this will give you a path forward. See if anyone else has reported a more recent regression that matches your problem, and if not then report the problem.I encountered a new problem in the i915 driver the first time I booted a 3.16-rc kernel on this computer. When it switched over to the frame buffer driver, the screen went blank and stayed that way.
Here is another example:
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url was:"https://lkml.org/lkml/2014/9/1/26%5Bquote%5DI"
linktext was:"https://lkml.org/lkml/2014/9/1/26"
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Note that most systems try to load the video driver ASAP (and we might be joining the club) so the hang you get later on in the boot process could correspond to this bug of hanging at the start of the boot process.
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url was:"https://lkml.org/lkml/2014/9/1/26%5Bquote%5DI"
linktext was:"I tried to upgrade my kernel from 3.16 to 3.17-rc2 and I found that my laptop was unable to boot. The boot process hangs after 2-3 seconds"
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I hope this gives you enough info to get started. If you want more help please send me an email or a PM.