Control: tag -1 - moreinfo Control: reassign -1 plymouth On Wed, 2015-11-25 at 11:40 +0100, Stefano Zacchiroli wrote: > TL;DR: it seems to be a plymouth issue. > > On Sun, Nov 22, 2015 at 10:19:12PM +0000, Ben Hutchings wrote: > > Can you try this: > > > > - Boot with the added parameter: break=top > > - In the shell, run: > > echo 1 >/proc/sys/kernel/sysrq > > openvt > > exit > > - Once the system has hung, press Alt-SysRq, Alt-W, Alt-SysRq, Alt-L > > - Switch to VT 2 then show the kernel log with: dmesg | less > > - Send photos of all the call traces > > I haven't done all of the above, because I don't know what generates a > SysRq on ThinkPad's keyboards. Do you know? I've a T440s. (I guess the > web would probably tell me, but I'm writing this on a plane w/o net > connection..., sorry about that.)
Possibly Fn-S (from https://support.lenovo.com/gb/en/documents/ht074004). > Nonetheless I've used the shell obtained with openvt to compare the > running processes in the linux 4.1 and 4.3 cases. In 4.1 (where the boot > works) the processes asking for the luks password is > "/lib/cryptsetup/askpass Please unlock disk sda3_crypt:" ; in 4.3 (where > the boot doesn't work) is "plymouth ask-for-password --prompt Please > unlock disk sda3_crypt". In both cases, the process with the next PID, > after askpass/plymouth, is "/sbin/cryptsetup -T 1 --allow-discards open > --type luks ". > > So this bug might deserve a reassign to plymouth, I guess. > > Still, why are kernels 4.2 and 4.3 triggering plymouth usage, whereas > 4.1 is not? (FWIW, all my grub entries have "splash" on the kernel > cmdline.) Perhaps you installed plymouth after Linux 4.2? Only the newest initramfs is updated when you install plymouth (and most other packages that trigger an initramfs update). Ben. -- Ben Hutchings This sentence contradicts itself - no actually it doesn't.
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