[Bug 1243267] [NEW] Backlight brightness control doesn't work
Public bug reported: Hello, during a kernel update from 3.11.0-4 up to 3.11.0-9 i've found out that my brightness controll of my Notebook (Lenovo Thinkpad T430-D17 (nvidia-graphic card, optimus disabled, driver version: 325.15) does not work). Therefore, i have tried several kernel from kernel.org where all Kernel provides the backlight control. To get comparable values, i have tried the kernel version ubuntu-kernel: Ubuntu 3.12.0-0.2-generic and 3.12.0-rc6 By using the the ubuntu kernel, i wasn't able to control the backlight brightness but by using the kernel profided by kernel.org works. Therefore, i began to search the patch lists of ubuntu and find this patch: http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-trusty.git;a=blobdiff;f=drivers/acpi/blacklist.c;h=f49ffaedaefdaa28d533d339a3f5cda073687ed7;hp=9515f18898b2b578053c58309185daa7934cfdda;hb=02cb06962306d96f59bc97ec8289c14b73bafb4e;hpb=2eb9acd1a1deb3f4d6428d022fc43541c9e70069. I have reverted this patch and the brightness control of my notebook works fine. If anybody wants to execute the ubuntu-bug program, you should note, that i'm not using ubuntu, i'm only using the ubuntu kernel and the ubuntu-bug program is not in my repositories. Therefore, i supply the lspci-vnvn report. If any other logs or reports are missing please feel free to ask me. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: acpi backlight lenovo t430 thinkpad ** Attachment added: lspci-vnvn.log https://bugs.launchpad.net/bugs/1243267/+attachment/3887529/+files/lspci-vnvn.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1243267 Title: Backlight brightness control doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1243267/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1243267] Re: Backlight brightness control doesn't work
Hi, here are all files you wanted in a tar.gz file format. Every output is marked, when the files have been generated (backlight_ok or backlight_NOT_ok). One maybe important fact is, that if i write in to /etc/classes/.../brightness nothing happens, the file actual_brightness shows the written value. But if I'm using xcfe4-power-manager and using the Fn keys it seems to be working and the value in the file actual_brightness changes as well. When i reach the highes possible brightness, the file actual_brightness does not show 100 (which is the max brightness when i'm using the kernel, where the brightness control seems to be working) instead of this it shows only the number 6. The same behavior applies to the not working version of the kernel. ** Attachment added: acpi-tables.txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1243267/+attachment/3887574/+files/acpi-tables.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1243267 Title: Backlight brightness control doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1243267/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1243267] Re: Backlight brightness control doesn't work
I'm sorry i have choosen a wrong file. ** Attachment added: dmesg, acpi-table, dmi, etc. logs https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1243267/+attachment/3887575/+files/logs.tar.gz ** Changed in: linux (Ubuntu) Status: Incomplete = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1243267 Title: Backlight brightness control doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1243267/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1243267] Re: Backlight brightness control doesn't work
Here you are... but both files are equal The naming convention is in this tar.gz the same as the provided files before. ** Attachment added: path_backlight.tar.gz https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1243267/+attachment/3887639/+files/path_backlight.tar.gz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1243267 Title: Backlight brightness control doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1243267/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
