I reported this on bugzilla also a few days ago, but I'm not sure if that is actually the right place to report, so copying to the mailing list... Starting with the first 4.18 RC kernel, my system experiences general protection faults leading to kernel panic shortly after the login prompt appears on most boots. Occasionally that doesn't happen and instead numerous other seemingly random stack traces are printed (bad page map, scheduling while atomic, null pointer deref, etc), but either way the system is unusable. This bug remains up through the latest mainline kernel 4.19-rc2. Booting with my USB ATSC tv tuner disconnected prevents the bug from happening. Kernel bisection between v4.17 and 4.18-rc1 shows problem is caused by: 1a0c10ed7bb1 media: dvb-usb-v2: stop using coherent memory for URBs Building both 4.18.6 and 4.19-rc2 with that commit reverted resolves the bug for me. My DVB hardware uses driver mxl111sf: Bus 002 Device 003: ID 2040:c61b Hauppauge Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x2040 Hauppauge idProduct 0xc61b bcdDevice 0.00 iManufacturer 1 Hauppauge iProduct 2 WinTV Aero-M Other system info: Arch Linux x86_64 Intel i7-3770 16 GB ram Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=201055 Arch bug: https://bugs.archlinux.org/task/59990 Thanks, Dan Ziemba
