Can you add the boot option of "drm.debug=0x04" and do the following test?
1. get the output of "cat /proc/acpi/button/LID/*/state", dmesg,
intel_reg_dumper before close the LID
2. close the LID
3. Open the LID
4. Please login the system by using ssh and get the output of " cat
/proc/acpi/button/LID/*/state", dmesg, intel_reg_dumper again.
Thanks.
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Screen backlight doesn't come on again after opening the lid
https://bugs.launchpad.net/bugs/540134
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