This is what I got with a bisect between tags v5.7-rc2 and v5.7. It looks like a merge commit. Assuming that looks right I'll see if I can figure out how to do a bisect on the individual commits of the merge.
$ git bisect bad 900db15047044ef50b32e23630880f4780ec5b9e is the first bad commit commit 900db15047044ef50b32e23630880f4780ec5b9e Merge: 86852175b016 e9bdf7e655b9 Author: Linus Torvalds <torva...@linux-foundation.org> Date: Sat May 30 12:26:21 2020 -0700 Merge tag 'gpio-v5.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO fixes from Linus Walleij: "Here are some (very) late fixes for GPIO, none of them very serious except the one tagged for stable for enabling IRQ on open drain lines: - Fix probing of mvebu chips without PWM - Fix error path on ida_get_simple() on the exar driver - Notify userspace properly about line status changes when flags are changed on lines. - Fix a sleeping while holding spinlock in the mellanox driver. - Fix return value of the PXA and Kona probe calls. - Fix IRQ locking of open drain lines, it is fine to have IRQs on open drain lines flagged for output" * tag 'gpio-v5.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio: fix locking open drain IRQ lines gpio: bcm-kona: Fix return value of bcm_kona_gpio_probe() gpio: pxa: Fix return value of pxa_gpio_probe() gpio: mlxbf2: Fix sleeping while holding spinlock gpiolib: notify user-space about line status changes after flags are set gpio: exar: Fix bad handling for ida_simple_get error path gpio: mvebu: Fix probing for chips without PWM drivers/gpio/gpio-bcm-kona.c | 2 +- drivers/gpio/gpio-exar.c | 7 +++++-- drivers/gpio/gpio-mlxbf2.c | 6 +++--- drivers/gpio/gpio-mvebu.c | 15 +++++++++------ drivers/gpio/gpio-pxa.c | 4 ++-- drivers/gpio/gpiolib.c | 26 ++++++++++++++++++++++---- 6 files changed, 42 insertions(+), 18 deletions(-) -- 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/1808418 Title: Thinkpad T430u won't boot without noapic workaround Status in linux package in Ubuntu: Confirmed Status in linux source package in Bionic: New Bug description: I've used Ubuntu on this specific machine for years without problems, but starting with the 4.13 kernel that came with the 17.10 HWE and continuing into 18.04 kernels my computer would no longer boot, hanging at various screens: - A blank screen with a flashing cursor - A screen with this message: Loading Linux 4.13.0.36-generic ... Loading initial ramdisk ... - A screen with kernel messages, ending in: APCI: EC: interrupt blocked I've encountered the bug in a number of kernels, including: - 4.13.0-32 - 4.13.0-36 - 4.13.0-37 - 4.15.0-24 - 4.15.0-34 - 4.15.0-36 - 4.15.0-38 - 4.15.0-42 - 4.20.0-rc7 I was able to work around the issue by adding noapic to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default grub, e.g.: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash noapic" I'm not entirely sure of the consequences of this workaround, but one thing I've noticed is significantly reduced battery life. This bug seems very similar to what's described here for the Thinkpad E485/E585: https://evilazrael.de/node/401 I'll attach screenshots of various times I've encountered this bug over the last year. $ lsb_release -rd Description: Ubuntu 18.04.1 LTS Release: 18.04 $ apt-cache policy linux-image-4.15.0-42-generic linux-image-4.15.0-42-generic: Installed: 4.15.0-42.45 Candidate: 4.15.0-42.45 Version table: *** 4.15.0-42.45 500 500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-42-generic 4.15.0-42.45 ProcVersionSignature: Ubuntu 4.15.0-42.45-generic 4.15.18 Uname: Linux 4.15.0-42-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: bryan 2349 F.... pulseaudio CurrentDesktop: XFCE Date: Thu Dec 13 15:31:15 2018 HibernationDevice: RESUME=UUID=4afa8032-cfe5-45f4-a626-738ab33904ac InstallationDate: Installed on 2014-05-08 (1680 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: LENOVO 3351CTO ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-42-generic root=UUID=cffbc87d-956b-4986-94df-b3b64ae5237f ro quiet splash noapic vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.15.0-42-generic N/A linux-backports-modules-4.15.0-42-generic N/A linux-firmware 1.173.2 SourcePackage: linux UpgradeStatus: Upgraded to bionic on 2018-07-12 (154 days ago) dmi.bios.date: 06/01/2018 dmi.bios.vendor: LENOVO dmi.bios.version: H6ETA0WW (2.18 ) dmi.board.asset.tag: Not Available dmi.board.name: 3351CTO dmi.board.vendor: LENOVO dmi.board.version: Win8 STD DPK TPG dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrH6ETA0WW(2.18):bd06/01/2018:svnLENOVO:pn3351CTO:pvrThinkPadT430u:rvnLENOVO:rn3351CTO:rvrWin8STDDPKTPG:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.family: ThinkPad T430u dmi.product.name: 3351CTO dmi.product.version: ThinkPad T430u dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1808418/+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