On Mon, 2016-10-24 at 11:49 +0200, Petra Ruebe-Pugliese wrote: [...] > Okay. So I've sacrificed the less important of the two > notebooks again and repeated the "apt-get dist-upgrade" > so that the current kernel got installed again. > > In doing so, two messages appeared that looked approximately > like this: > > /etc/kernel-img.conf:4: ignoring unknown parameter relative_links > /etc/kernel-img.conf:6: ignoring unknown parameter do_bootfloppy > > The second of these lines reminds me of the fact that with > previous kernel versions the boot process used to stop in the > same place for quite some (disquieting!) time and then continued > with some message about a read error on /dev/fd<sth.>
I don't know what 'do_bootfloppy' used to do, but I think it's unrelated to loading of the floppy driver. It sounds like you have quite an old installation that might also have some obsolete scripts left in the boot process. Also, note that the /dev/fd directory is unrelated to floppy drives. > This was the case on all my computers, although these two > thinkpads no longer have a floppy drive. > > Now to the photo. I've tried to make one. > With these new boot parameters there is a lot of output rushing > through which I could not catch. So I'm sending only what was > to be seen when it stopped. Maybe that's enough to put you on > the right track. If not, please tell me what else I can do > to bring some light into the matter. OK, this is the same crash that someone else reported and I think I know which change triggered it (though not why). Does the attached patch fix the crash? (Instructions for rebuilding the package are at <https://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-common-official>.) Ben. -- Ben Hutchings For every complex problem there is a solution that is simple, neat, and wrong.
From 21285bd44b2144b121eeb35abed99fa6ece2a5a4 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <b...@decadent.org.uk>
Date: Mon, 24 Oct 2016 03:05:42 +0100
Subject: [PATCH] Revert "arch/x86: Handle non enumerated CPU after physical
hotplug"
This reverts commit 4927f9e7a267883ca0741d3fefa063faf43a9344, which
was commit 2a51fe083eba7f99cbda72f5ef90cdf2f4df882c upstream.
---
arch/x86/kernel/smpboot.c | 18 +++---------------
1 file changed, 3 insertions(+), 15 deletions(-)
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 82b17373b66a..75a045424be7 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1406,21 +1406,9 @@ __init void prefill_possible_map(void)
{
int i, possible;
- /* No boot processor was found in mptable or ACPI MADT */
- if (!num_processors) {
- int apicid = boot_cpu_physical_apicid;
- int cpu = hard_smp_processor_id();
-
- pr_warn("Boot CPU (id %d) not listed by BIOS\n", cpu);
-
- /* Make sure boot cpu is enumerated */
- if (apic->cpu_present_to_apicid(0) == BAD_APICID &&
- apic->apic_id_valid(apicid))
- generic_processor_info(apicid, boot_cpu_apic_version);
-
- if (!num_processors)
- num_processors = 1;
- }
+ /* no processor from mptable or madt */
+ if (!num_processors)
+ num_processors = 1;
i = setup_max_cpus ?: 1;
if (setup_possible_cpus == -1) {
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