https://bugzilla.kernel.org/show_bug.cgi?id=201035
Bug ID: 201035 Summary: I2C bus probing crash on OpenChrome DRM Product: Drivers Version: 2.5 Kernel Version: 4.19 rc1 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: blocking Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: kevinbrace@gmx.com Regression: No
OpenChrome DRM was working fine (i.e., able to normally boot Xubuntu 16.04) until DRM maintainer's version of Linux 4.18 rc4. When I upgraded to Linux 4.18 rc7, it stopped working. I also upgraded to Linux 4.19 rc1, but it crashes for a similar reason. It appears that there is a NULL pointer reference when probing for I2C bus. The bug was observed on HP 2133 mini-note and VIA Embedded EPIA-M830 mainboard.