Public bug reported: I usually run kvm with '-serial stdio' after adding GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0" to /etc/default/grub. This will give me a serial console where I can login and, more important, get kernel logs.
After install 4.8.0-16.17 I'm unable to login in the serial console, and I'm getting a lot of messages: genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) System seems to be working fine otherwise. 4.8.0-15.16 didn't show this behaviour. The obvious suspect commits are the "SAUCE: irqchip/gicv3-its:*" in -16, although the several config changes may also be involved. ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Affects: linux (Ubuntu Yakkety) Importance: Undecided Status: Confirmed ** Tags: kernel-4.8 ** Attachment added: "dmesg.log" https://bugs.launchpad.net/bugs/1627052/+attachment/4747102/+files/dmesg.log ** Also affects: linux (Ubuntu Yakkety) Importance: Undecided Status: New -- 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/1627052 Title: 4.8.0-16.17: genirq: Flags mismatch serial vs goldfish_pdev_bus Status in linux package in Ubuntu: Confirmed Status in linux source package in Yakkety: Confirmed Bug description: I usually run kvm with '-serial stdio' after adding GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0" to /etc/default/grub. This will give me a serial console where I can login and, more important, get kernel logs. After install 4.8.0-16.17 I'm unable to login in the serial console, and I'm getting a lot of messages: genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) System seems to be working fine otherwise. 4.8.0-15.16 didn't show this behaviour. The obvious suspect commits are the "SAUCE: irqchip/gicv3-its:*" in -16, although the several config changes may also be involved. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1627052/+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