https://bugzilla.kernel.org/show_bug.cgi?id=200045 Bug ID: 200045 Summary: i2c-algo-bit: black screen on 'radeon' module probing Product: Drivers Version: 2.5 Kernel Version: 4.16 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@xxxxxxxxxxxxxxxxxxxx Reporter: cerg2010cerg2010@xxxxxxx Regression: No Created attachment 276499 --> https://bugzilla.kernel.org/attachment.cgi?id=276499&action=edit lspci -v Hi, After updating to the 4.16 kernel I started to get a black screen on boot, without something useful in log. This bug also happens in latest version (4.17.1). I'm using HP Pavilion dv6-3090er laptop with an exotic ATI/AMD switchable graphics (radeon 4250 integrated/5650 discrete). I bisected the issue down to commit 3e5f06bed72fe72166a6778f630241a893f67799 ("i2c: algo-bit: init the bus to a known state") and reverting this fixes the problem. Also loading radeon module with hw_i2c=1 gives me working display with full brightness, and attempt to change it results in reboot. Thanks. -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
