On Wed, Jan 10, 2018 at 5:45 PM, Joseph Salisbury <joseph.salisb...@canonical.com> wrote: > Thanks for the feedback, Christian. I would much rather install them > manually. I am able to do that without a problem. However, I am unable > to access the GRUB menu in the usual way to select a specific kernel.
If you test through autotest, then there isn't a good way to manually intercept "while" running. > I tried all the usual way, holding shift, modifying /etc/default/grub > setting, but none seem to work. Other than just making sure that grub picks the right default by making sue the to-be-tested kernel is the latest I worked by modifying grub. Checking again if this still works ... I had a zesty testbed to remove anyway, so I could kill it if needed. By default it does boot "4.8.0-26-generic" Note: working in guest image via: $ qemu-system-x86_64 -m 1024 -smp 1 -nographic -net nic,model=virtio -net user -enable-kvm -cpu kvm64,+vmx,+lahf_lm ~/work/autopkgtest-zesty-amd64.img I installed 4.7.10-040710_4.7.10-040710.201610220847 from mainline builds as it is older and therefore would not be selected by grub automatically. After install I checked autopkgtest output... autopkgtest [07:54:48]: testbed running kernel: Linux 4.8.0-26-generic #28-Ubuntu SMP Tue Oct 18 14:39:52 UTC 2016 Ok, now lets modify grub to boot the older kernel: I found that (at least in this case) the BIOS boot partition kind of breaks update-grub. /dev/sda1 227328 25583582 25356255 12.1G Linux filesystem /dev/sda14 2048 10239 8192 4M BIOS boot /dev/sda15 10240 227327 217088 106M EFI System The middle one is the odd one - that is the non efi compat grub img storage area. Anyway - to get around that I was adding: $ apt-get install --reinstall grub-efi $ echo "GRUB_DISABLE_OS_PROBER=true" | sudo tee -a /etc/default/grub So as usual e.g.: echo 'GRUB_DEFAULT="Advanced options for Ubuntu>Ubuntu, with Linux 4.7.10-040710-generic"' | sudo tee -a /etc/default/grub $ sudo update-grub And e voila: autopkgtest [08:20:29]: testbed running kernel: Linux 4.7.10-040710-generic #201610220847 SMP Sat Oct 22 12:50:14 UTC 2016 Other than the extra hoop I had to jump for the BIOS boot there was nothing special in my try. And I'd assume that could as much appear on real HW. I hope that helps to drive your test kernels. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1736390 Title: openvswitch: kernel oops destroying interfaces on i386 Status in linux package in Ubuntu: Fix Committed Status in openvswitch package in Ubuntu: Confirmed Status in linux source package in Artful: In Progress Status in openvswitch source package in Artful: Confirmed Status in linux source package in Bionic: Fix Committed Status in openvswitch source package in Bionic: Confirmed Bug description: Reproducable on bionic using the autopkgtest's from openvswitch on i386: [ 41.420568] BUG: unable to handle kernel NULL pointer dereference at (null) [ 41.421000] IP: igmp_group_dropped+0x21/0x220 [ 41.421246] *pdpt = 000000001d62c001 *pde = 0000000000000000 [ 41.421659] Oops: 0000 [#1] SMP [ 41.421852] Modules linked in: veth openvswitch nf_conntrack_ipv6 nf_nat_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_defrag_ipv6 nf_nat nf_conntrack libcrc32c 9p fscache ppdev kvm_intel kvm 9pnet_virtio irqbypass input_leds joydev 9pnet parport_pc serio_raw parport i2c_piix4 qemu_fw_cfg mac_hid sch_fq_codel ip_tables x_tables autofs4 btrfs xor raid6_pq psmouse virtio_blk virtio_net pata_acpi floppy [ 41.423855] CPU: 0 PID: 5 Comm: kworker/u2:0 Tainted: G W 4.13.0-18-generic #21-Ubuntu [ 41.424355] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 41.424849] Workqueue: netns cleanup_net [ 41.425071] task: db8fba80 task.stack: dba10000 [ 41.425346] EIP: igmp_group_dropped+0x21/0x220 [ 41.425656] EFLAGS: 00010202 CPU: 0 [ 41.425864] EAX: 00000000 EBX: dd726360 ECX: dba11e6c EDX: 00000002 [ 41.426335] ESI: 00000000 EDI: dd4db500 EBP: dba11dcc ESP: dba11d94 [ 41.426687] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 41.426990] CR0: 80050033 CR2: 00000000 CR3: 1e6d6d60 CR4: 000006f0 [ 41.427340] Call Trace: [ 41.427485] ? __wake_up+0x36/0x40 [ 41.427680] ip_mc_down+0x27/0x90 [ 41.427869] inetdev_event+0x398/0x4e0 [ 41.428082] ? skb_dequeue+0x5b/0x70 [ 41.428286] ? wireless_nlevent_flush+0x4c/0x90 [ 41.428541] notifier_call_chain+0x4e/0x70 [ 41.428772] raw_notifier_call_chain+0x11/0x20 [ 41.429023] call_netdevice_notifiers_info+0x2a/0x60 [ 41.429301] dev_close_many+0x9d/0xe0 [ 41.429509] rollback_registered_many+0xd7/0x380 [ 41.429768] unregister_netdevice_many.part.102+0x10/0x80 [ 41.430075] default_device_exit_batch+0x134/0x160 [ 41.430344] ? do_wait_intr_irq+0x80/0x80 [ 41.430650] ops_exit_list.isra.8+0x4d/0x60 [ 41.430886] cleanup_net+0x18e/0x260 [ 41.431090] process_one_work+0x1a0/0x390 [ 41.431317] worker_thread+0x37/0x450 [ 41.431525] kthread+0xf3/0x110 [ 41.431714] ? process_one_work+0x390/0x390 [ 41.431941] ? kthread_create_on_node+0x20/0x20 [ 41.432187] ret_from_fork+0x19/0x24 [ 41.432382] Code: 90 90 90 90 90 90 90 90 90 90 3e 8d 74 26 00 55 89 e5 57 56 53 89 c3 83 ec 2c 8b 33 65 a1 14 00 00 00 89 45 f0 31 c0 80 7b 4b 00 <8b> 06 8b b8 20 03 00 00 8b 43 04 0f 85 5e 01 00 00 3d e0 00 00 [ 41.433405] EIP: igmp_group_dropped+0x21/0x220 SS:ESP: 0068:dba11d94 [ 41.433750] CR2: 0000000000000000 [ 41.433961] ---[ end trace 595db54cab84070c ]--- system then becomes unresponsive; no further interfaces can be created. 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