Can you do a kernel bisection? First, find the last good -rc kernel and the first bad -rc kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/
Then, $ sudo apt build-dep linux $ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git $ cd linux $ git bisect start $ git bisect good $(the good version you found) $ git bisect bad $(the bad version found) $ make localmodconfig $ make -j`nproc` deb-pkg Install the newly built kernel, then reboot with it. If the issue still happens, $ git bisect bad Otherwise, $ git bisect good Repeat to "make -j`nproc` deb-pkg" until you find the commit that causes the regression. -- 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/1778323 Title: Touchpad doesn't work in 4.17 or later Status in linux package in Ubuntu: Confirmed Status in linux source package in Cosmic: Confirmed Bug description: Using the builds at http://kernel.ubuntu.com/~kernel-ppa/mainline/ I can successfully install and run 4.16.17 (Linux version 4.16.17-041617-generic (kernel@tangerine) (gcc version 7.3.0 (Ubuntu 7.3.0-23ubuntu2)) #201806201630 SMP Wed Jun 20 20:32:55 UTC 2018) but not 4.17.2 or 4.18-rc1. In the later ones, the touchpad does not work after boot and rebooting stalls: Jun 18 15:42:50 pkxps kernel: [ 242.366528] INFO: task systemd-udevd:309 blocked for more than 120 seconds. Jun 18 15:42:50 pkxps kernel: [ 242.366540] Not tainted 4.17.2-041702-generic #201806160433 Jun 18 15:42:50 pkxps kernel: [ 242.366545] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jun 18 15:42:50 pkxps kernel: [ 242.366551] systemd-udevd D 0 309 273 0x80000104 Jun 18 15:42:50 pkxps kernel: [ 242.366558] Call Trace: Jun 18 15:42:50 pkxps kernel: [ 242.366576] __schedule+0x291/0x870 Jun 18 15:42:50 pkxps kernel: [ 242.366582] ? __switch_to_asm+0x34/0x70 Jun 18 15:42:50 pkxps kernel: [ 242.366587] ? __switch_to_asm+0x40/0x70 Jun 18 15:42:50 pkxps kernel: [ 242.366596] ? get_work_pool+0x40/0x40 Jun 18 15:42:50 pkxps kernel: [ 242.366602] schedule+0x2c/0x80 Jun 18 15:42:50 pkxps kernel: [ 242.366609] schedule_timeout+0x1db/0x360 Jun 18 15:42:50 pkxps kernel: [ 242.366615] ? __schedule+0x299/0x870 Jun 18 15:42:50 pkxps kernel: [ 242.366623] ? get_work_pool+0x40/0x40 Jun 18 15:42:50 pkxps kernel: [ 242.366629] wait_for_completion+0xba/0x140 Jun 18 15:42:50 pkxps kernel: [ 242.366637] ? wake_up_q+0x80/0x80 Jun 18 15:42:50 pkxps kernel: [ 242.366645] flush_work+0x127/0x1e0 Jun 18 15:42:50 pkxps kernel: [ 242.366652] ? worker_detach_from_pool+0xa0/0xa0 Jun 18 15:42:50 pkxps kernel: [ 242.366661] __cancel_work_timer+0x131/0x1b0 Jun 18 15:42:50 pkxps kernel: [ 242.366669] cancel_delayed_work_sync+0x13/0x20 Jun 18 15:42:50 pkxps kernel: [ 242.366676] power_supply_unregister+0x37/0xb0 Jun 18 15:42:50 pkxps kernel: [ 242.366682] devm_power_supply_release+0x11/0x20 Jun 18 15:42:50 pkxps kernel: [ 242.366692] release_nodes+0x110/0x1f0 Jun 18 15:42:50 pkxps kernel: [ 242.366701] devres_release_group+0x7c/0xb0 Jun 18 15:42:50 pkxps kernel: [ 242.366718] wacom_remove+0xce/0x120 [wacom] Jun 18 15:42:50 pkxps kernel: [ 242.366733] hid_device_remove+0x55/0xb0 [hid] Jun 18 15:42:50 pkxps kernel: [ 242.366741] device_release_driver_internal+0x15b/0x220 Jun 18 15:42:50 pkxps kernel: [ 242.366751] ? __hid_bus_driver_added+0x40/0x40 [hid] Jun 18 15:42:50 pkxps kernel: [ 242.366760] ? hid_destroy_device+0x60/0x60 [hid] Jun 18 15:42:50 pkxps kernel: [ 242.366766] device_release_driver+0x12/0x20 Jun 18 15:42:50 pkxps kernel: [ 242.366771] device_reprobe+0x30/0x50 Jun 18 15:42:50 pkxps kernel: [ 242.366782] __hid_bus_reprobe_drivers+0x4b/0x60 [hid] Jun 18 15:42:50 pkxps kernel: [ 242.366793] bus_for_each_dev+0x74/0xb0 Jun 18 15:42:50 pkxps kernel: [ 242.366803] __hid_bus_driver_added+0x2c/0x40 [hid] -- Jun 18 15:42:50 pkxps kernel: [ 242.366859] ? __vunmap+0x81/0xb0 Jun 18 15:42:50 pkxps kernel: [ 242.366867] ? _cond_resched+0x19/0x40 Jun 18 15:42:50 pkxps kernel: [ 242.366874] ? kmem_cache_alloc_trace+0xb8/0x1c0 Jun 18 15:42:50 pkxps kernel: [ 242.366883] ? do_init_module+0x27/0x209 Jun 18 15:42:50 pkxps kernel: [ 242.366892] do_init_module+0x5f/0x209 Jun 18 15:42:50 pkxps kernel: [ 242.366900] load_module+0x1987/0x1f10 Jun 18 15:42:50 pkxps kernel: [ 242.366913] __do_sys_finit_module+0xfc/0x120 Jun 18 15:42:50 pkxps kernel: [ 242.366919] ? __do_sys_finit_module+0xfc/0x120 Jun 18 15:42:50 pkxps kernel: [ 242.366929] __x64_sys_finit_module+0x1a/0x20 Jun 18 15:42:50 pkxps kernel: [ 242.366936] do_syscall_64+0x5a/0x120 Jun 18 15:42:50 pkxps kernel: [ 242.366942] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Jun 18 15:42:50 pkxps kernel: [ 242.366948] RIP: 0033:0x7f03e2729839 Jun 18 15:42:50 pkxps kernel: [ 242.366952] RSP: 002b:00007ffde9a0e588 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 Jun 18 15:42:50 pkxps kernel: [ 242.366959] RAX: ffffffffffffffda RBX: 0000561aff969a00 RCX: 00007f03e2729839 Jun 18 15:42:50 pkxps kernel: [ 242.366963] RDX: 0000000000000000 RSI: 00007f03e24080e5 RDI: 0000000000000007 Jun 18 15:42:50 pkxps kernel: [ 242.366967] RBP: 00007f03e24080e5 R08: 0000000000000000 R09: 00007ffde9a0e6a0 Jun 18 15:42:50 pkxps kernel: [ 242.366970] R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000 Jun 18 15:42:50 pkxps kernel: [ 242.366974] R13: 0000561aff95d850 R14: 0000000000020000 R15: 0000561aff969a00 Jun 18 15:42:50 pkxps kernel: [ 242.366987] INFO: task kworker/u8:3:394 blocked for more than 120 seconds. Jun 18 15:42:50 pkxps kernel: [ 242.366996] Not tainted 4.17.2-041702-generic #201806160433 Jun 18 15:42:50 pkxps kernel: [ 242.367000] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jun 18 15:42:50 pkxps kernel: [ 242.367006] kworker/u8:3 D 0 394 2 0x80000000 Jun 18 15:42:50 pkxps kernel: [ 242.367021] Workqueue: events_power_efficient power_supply_deferred_register_work Jun 18 15:42:50 pkxps kernel: [ 242.367024] Call Trace: Jun 18 15:42:50 pkxps kernel: [ 242.367034] __schedule+0x291/0x870 Jun 18 15:42:50 pkxps kernel: [ 242.367040] ? __switch_to_asm+0x40/0x70 Jun 18 15:42:50 pkxps kernel: [ 242.367048] schedule+0x2c/0x80 Jun 18 15:42:50 pkxps kernel: [ 242.367056] schedule_preempt_disabled+0xe/0x10 Jun 18 15:42:50 pkxps kernel: [ 242.367063] __mutex_lock.isra.4+0x18c/0x4d0 Jun 18 15:42:50 pkxps kernel: [ 242.367069] ? __switch_to_asm+0x34/0x70 Jun 18 15:42:50 pkxps kernel: [ 242.367074] ? __switch_to_asm+0x34/0x70 Jun 18 15:42:50 pkxps kernel: [ 242.367083] __mutex_lock_slowpath+0x13/0x20 Jun 18 15:42:50 pkxps kernel: [ 242.367090] ? __mutex_lock_slowpath+0x13/0x20 Jun 18 15:42:50 pkxps kernel: [ 242.367097] mutex_lock+0x2f/0x40 Jun 18 15:42:50 pkxps kernel: [ 242.367104] power_supply_deferred_register_work+0x2b/0x50 Jun 18 15:42:50 pkxps kernel: [ 242.367112] process_one_work+0x1de/0x3e0 Jun 18 15:42:50 pkxps kernel: [ 242.367119] worker_thread+0x32/0x410 Jun 18 15:42:50 pkxps kernel: [ 242.367126] kthread+0x121/0x140 Jun 18 15:42:50 pkxps kernel: [ 242.367132] ? process_one_work+0x3e0/0x3e0 Jun 18 15:42:50 pkxps kernel: [ 242.367138] ? kthread_create_worker_on_cpu+0x70/0x70 Jun 18 15:42:50 pkxps kernel: [ 242.367144] ret_from_fork+0x35/0x40 Jun 18 15:43:18 pkxps kernel: [ 269.976729] rfkill: input handler enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1778323/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
