Created attachment 163881 [details] dmesg output A new Lenovo Helix 2 laptop we have isn't working correctly, the Intel Broadwell-U chipset isn't detected by the kernel so DRM (and then X) isn't using it. Relevent lspci output: 00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated Graphics [8086:161e] (rev 08) To have the system boot I need to set acpi=off (I've tried acpi=ht and various other settings). If acpi is enabled then the last message displayed is the Grub messages. With acpi off, I can't use the screen or login in remotely. I expect that acpi is actually the issue, as if I try to manually insert the i915 module I get this in the dmesg output: [ 143.242134] i915: Unknown symbol acpi_lid_notifier_register (err 0) [ 143.244330] i915: Unknown symbol acpi_lid_notifier_unregister (err 0) [ 143.245648] i915: Unknown symbol acpi_lid_open (err 0) The laptop is running firmware v1.42 released 2015/01/15. Full dmesg out and Xorg.0.log is attached. If there is any further info I can gather please let me know.
These lvds acip calls in a platform that doesn't support lvds is so strange. Could you please boot again adding drm.debug=0xe at linux cmdline, grab and attach a new demesg?
Moved to https://bugs.freedesktop.org/show_bug.cgi?id=88797 .