hallynapw: just got the 4.4.112 update :)02:05
hallynof course, now i'm watching the 4.4.113-rc1 :(  now with minty retpoline flavor02:05
blazehow can I check the status of applied fixes (IBRS and IBPB)?08:38
jdstrandapw, bjf (cc sbeattie, tyhicks): I booted a Lenovo IdeaPad U460 into the new 4.13 linux-generic-hwe-16.04 kernel and it immediately reboots when selecting it from grub13:28
jdstrandapw, bjf (cc sbeattie, tyhicks): it can boot the 4.10 kernel fine13:29
jdstrandapw, bjf: because it won't boot, I can't ubuntu-bug it. can you advise on how to report?13:29
apwjdstrand, +filebug is your only real option13:31
jdstrandapw: what would be good to attach?13:31
apwjdstrand, and that is the -31 one yes ?13:31
tyhicksjdstrand: the kernel team will know better but in the meantime, you may want to try booting with the "nopti noibrs noibpb" kernel command line options to see if there's any different behavior13:31
jdstrandapw: meta is, kernel is 4.13.0-31.34~16.04.113:32
apwjdstrand, if you have nothing other than a blank screen then there is little to add, trying tyhicks options is the next step13:32
apwjdstrand, is this the first 3.13 you have tried on this ?13:32
jdstrandapw: it is the first 4.13, yes13:32
jdstrandthe 4.10 was ok13:32
apwyep, it has none of the new fun applied13:32
* jdstrand nods13:33
jdstrandapw: is there a pre meltdown/spectre 4.13 kernel that would be useful to try?13:33
tyhicksjdstrand: Ubuntu-4.13.0-21.24 is the pre meltdown/spectre 4.13 kernel13:37
jdstrandok, I'll try that to see if it is a 4.13 thing or a security patch thing13:37
jdstrandapw, bjf (cc sbeattie and tyhicks): ok, I filed https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/174494213:51
ubot5Ubuntu bug 1744942 in linux-hwe (Ubuntu) "Lenovo IdeaPad U460 fails to boot with 4.13.0-31.34~16.04.1" [Undecided,Confirmed]13:51
jdstrandI'll now try different command lines and kernels13:51
jdstrandI think it is a Westmere/Arandale if that is helpful13:52
jdstrand(though you might want to check the bug to be sure)13:52
jdstrandI also marked the bug 'Confirmed' to avoid the bot13:53
jdstrandtyhicks: I don't see any 4.13.0-21 kernels in https://launchpad.net/ubuntu/+source/linux-hwe/+publishinghistory13:54
jdstrandtyhicks: are you saying just boot the artful kernel?13:55
tyhicksjdstrand: there was a 4.13.0-21 artful kernel so I just assumed there was a 4.13.0-21 linux-hwe kernel13:55
jdstrandseems so13:55
jdstrandthat vintage is still 4.1013:56
apwjdstrand, it would have been linux-hwe-edge back then13:56
tyhicksoh, right... linux-hwe was bumped from 4.10 to 4.1313:56
jdstrandalso if it helps, it is an i386 install14:00
apwjdstrand, it makes it less worrying :)  in the sense if it is broke you are in a smaller set14:00
apwjdstrand, also does the latest 4.4 boot for you14:09
jdstrandapw: I'll test that too14:09
apwjdstrand, ta14:10
jdstrandapw: honestly, I forgot I was using 4.10 on that machine so going back to 4.4 wouldn't be so bad14:10
jdstrandwe'll see how things go14:10
apwjdstrand, and you finding an issue is always good14:11
albert23jdstrand: does that system have more than 4GB ram?14:18
albert23i have bisected a 32 bit boot failure with > 4GB ram and got 92a0f81... x86/cpu_entry_area: Move it out of the fixmap as first bad commit14:20
jdstrandalbert23: no. 4G14:20
albert23hmm, I thought the >4GB was important as it boots fine when pae is disabled in the kernel14:24
apwalbert23, it might not matter how much ram you have just that you are or are not using pae14:39
jdstrandapw, bjf (cc tyhicks and sbeattie): https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1744942/comments/1 14:54
ubot5Ubuntu bug 1744942 in linux-hwe (Ubuntu) "Lenovo IdeaPad U460 fails to boot with 4.13.0-31.34~16.04.1" [Undecided,Confirmed]14:54
jdstrandapw, albert23: note that pae is listed in cpuinfo14:54
jdstrandapw: right now I'm in an up to date 4.4 kernel, and it seems to be working so I'll stay there for now14:55
jdstrand(this is not my machine. if you need me to test kernels, I can, but possibily not immediately)14:55
albert23jdstrand: pae is also shown when pae is disabled in the kernel, and top shows 3547 MB ram instead of 800014:58
jdstrandit only has 4G, I promise14:59
apwjdstrand, sounds like a plan, we may have some h/w showing similar issues, so we can investigate15:00
tyhicksbjf, apw: FYI, chrisccoulson hit an issue where he could not boot an artful VM with the new kernel that we determined to be related to the bad intel-microcode that was reverted yesterday15:45
tyhickshere's the bad combination of versions:15:46
tyhickshost kernel: 4.13.0-2515:46
tyhickshost microcode: 3.20180108.0~ubuntu17.10.115:46
tyhicksguest kernel: 4.13.0-3115:46
tyhicksbjf, apw: the guest kernel booted after updating the host kernel (4.13.0-31) OR applying the reverted microcode package (3.20180108.0+really20170707ubuntu17.10.1) in the host and rebooting15:48
tyhicksI'm glad we reverted the microcode package yesterday15:48
tyhicksI don't think there's anything for the kernel team to do here but I wanted to point out the combination of old host kernel, bad microcode, and new guest kernel could cause VMs to not boot15:49
tyhicksthe solution is to apply the updates in the host (either the kernel or microcode but both are ideal) and reboot15:50
apwtyhicks, thanks, that is a good data point16:06
* alkisg still hasn't had any reply for "kernel reboots on i5's", https://bugzilla.kernel.org/show_bug.cgi?id=198529 ...16:12
ubot5bugzilla.kernel.org bug 198529 in x86-64 "Reboot on kernel load due to 92a0f81d" [High,New]16:12
tyhicksapw: btw, here's the stack trace from the guest kernel that chrisccoulson saw: https://www.dropbox.com/s/rt6v13rifm7qt8z/Screenshot%20from%202018-01-23%2014-25-00.png16:22
apwtyhicks, i wonder if chrisccoulson reported a bug with that, with what he was doing to trigger it16:25
tyhicksapw: he didn't but he could if it would help you all16:26
apwtyhicks, all and any issues; we want to know as much as possible about htem16:26
apwas any one may be impossible to fathom but that third one gives you insight into the set16:27
tyhickschrisccoulson: please file a bug to help out the kernel team track the issue that you hit (https://wiki.ubuntu.com/Kernel/Bugs)16:28
chrisccoulsontyhicks, sure, will do16:34
albert23alkisg: that's the same commit i found bad too, on i3-4010U (intel nuc)16:51
albert23that commit is known bad, see https://lkml.org/lkml/2017/12/23/121, but the fix 2 commits later still doesn't work for me16:52
alkisgalbert23: on 32bit installation, or 64bit?17:04
albert23alkisg: 32 bit17:05
alkisgThanks, I verified this on a number of i5 processors, but not on any i3's until you mentioned that one17:08
alkisgHappens on: i5-3470, i5-4460, i5-4440, i5-6200U, and doesn't happen on i3-4170,  i3-7100, Q6600, Q8300, i5-459017:12
alkisgalbert23: do you think we need to do something more, except the bisection I did to pinpoin the commit, and the bugzilla report?17:13
alkisgI would have expected some reply until now...17:13
albert23maybe mark is a regression17:14
alkisgCould you? And also comment that it affects you too?17:15
albert23I think it's better i you do it. At least Intel graphics never liked "me too's" in bug reports17:16
alkisgI thought that more than 1 user need to confirm a bug in order to get in the "confirmed" state17:17
alkisgOtherwise it's just monologue...17:17
alkisgAnyways, I'll revert the schools to 4.4 kernel and leave it for them to solve it when they can17:17
alkisgalbert23: btw, does it boot for you if you pass acpi=off? It worked on most of i5's, but a teacher reported it didn't work for him17:28
* alkisg also notes that there are no instructions in the ubuntu wiki on how to revert to the non-hwe kernel series... in the past, there were...17:31
albert23alkisg: yes, it does boot for me too with acpi=off17:32
albert23hmm, apparently acpi=off also mean no PTI17:43
albert23and also no PTI in a kvm guest and no PTI when the kernel is built  without PAE17:50

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