Control: tags -1 + moreinfo Michael,
On Thu, Jun 29, 2017 at 01:30:57AM +0300, Krylov Michael wrote: > Package: src:linux > Version: 4.9.30-2 > Severity: important > Tags: upstream > > Hello. > > It looks like I found a problem in the kernel that is currently shipped with > debian stretch. > > In the stretch kernel ASLR mechanism got enabled (kernel option > CONFIG_RANDOMIZE_BASE), which conflicts with the hibernation mechanism > (kernel option CONFIG_HIBERNATE). > > It is clearly stated in the CONFIG_RANDOMIZE_BASE help that enabling > KASLR will prevent kernel from hibernating, cite: > > If CONFIG_HIBERNATE is also enabled, KASLR is disabled at boot > time. To enable it, boot with "kaslr" on the kernel command > line (which will also disable hibernation). > > Unfortunately, in my case it is not disabled. That is, I'm able to > hibernate, and then, when I turn on my laptop (Thinkpad X220i) again, > kernel tries to restore the dump it made while hibernating, fails, and > that leads either to hard reset of the laptop, or just it turning off. > > I've spent around a week trying to find out why my hibernation doesn't > work. I suppose that, if KASLR is enabled (i.e. by default) the kernel > should disable hibernation *and* drop a message into dmesg that it can't > hibernate because of KASLR. > > I'm pretty sure that it is an upstream bug, so I mark this report as > upstream. I also tried 4.11 kernel from the unstable branch -- situation > is the same. Ist this issue still reproducible for your (in case HW available) with more recent kernels? Regards, Salvatore
