intrigeri wrote:
I just run a bunch of tests on three different laptops.
Below, emergency means that I've removed the boot USB stick once the
greeter appeared, applet means that I've used the GNOME panel applet
to shutdown the system, and N/M means N successes on M attempts.
ThinkPenguin Royal:
* 0.22~rc1: emergency = 0/3, applet = 0/3
* bugfix/sdmem_on_intel_gpu: emergency = 0/3, applet = 0/3
* bugfix/back-to-linux-3.10: emergency = 3/3, applet = 3/3
ThinkPad X201:
* bugfix/sdmem_on_intel_gpu: emergency = 1/3, applet = 1/3
* bugfix/back-to-linux-3.10: emergency = 3/3, applet = 3/3
ThinkPad X32:
* bugfix/back-to-linux-3.10: emergency = 3/3, applet = 3/3
So, I'm hereby requesting a review'n'merge of
bugfix/back-to-linux-3.10 into testing and devel (there's an APT merge
to do, too). bertagaz will take care of it. Merged into experimental,
pushed to origin and lizard so the next nightly build from
experimental will have this stuff.
Once this branch is merged, I'll file a ticket to unblock the
situation later, as we can't ship Linux 3.10 forever, and will edit
the call for testing 0.22~rc1 so that we get feedback from
non-Intel-graphics users and hopefully understand better who's
affected exactly.
My tests, applet only (success/total):
* before any fix: 0/3
* sdmem_on_intel_gpu [1]: 2/3
* back-to-linux-3.10 [2]: 3/3
Apparently my fix does not fix it completely, so reverting to an older
kernel version seems to be the most sane thing to do right now, yes.
I won't try to fix this problem anymore, so unless anyone else is up to
it, we have to hope a future linux kernel version works again.
I believe the underlying problem is that kexec doesn't play well with all
drivers/hardware, since they are not properly deinitialized or cannot be
properly deinitialized, leaving memory-mapped regions the newly loaded
kernel does not know about. The longstanding known issues page lists
similar problems for other computers, some with non-Intel graphic
hardware.
[1] tails-i386-experimental-0.23-20131202T0830Z-07817d7.iso
[2] tails-i386-experimental-0.23-20131202T1339Z-92b9fbb.iso
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