Neale Upstone: >" This bug is with Lenovo vendor backlight" The bug is not with the Lenovo vendor backlight. It's either a bug in the linux kernel (likely), or a bug in the BIOS.
>"The guidance on investigating backlight issues..." As is noticed in the guidance, it doesn't tell you to use it forever, but as a debugging step to see if that allows one to change the backlight if one is having an issue with it. This information tells developers where to look within the code to search for a bug depending on the outcome. Also, you don't need to advise on the contents of the article, given I've contributed towards it as per https://wiki.ubuntu.com/Kernel/Debugging/Backlight?action=info . Hence, could you please answer the question asked in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1516370/comments/9 ? ** Tags added: needs-bisect regression-update -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1516370 Title: Vendor backlight on Lenovo Z580 having random hotkeys issues To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1516370/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
