Hi Po-Hsu Lin! Thank you for the rapid reply. I have installed the kernel you suggested. Also I removed "acpi_osi=" kernel parameter. I confirm that everything works fine including the applet. I hope this patch will become an official update for Ubuntu 16.04.
Thank you! Best regards, Sergey Nikitin пт, 19 Июл 2019, 7:00 Po-Hsu Lin <po-hsu....@canonical.com>: > Hi, > it looks like this might be the cause: > > https://kernel.ubuntu.com/git/ubuntu/ubuntu-xenial.git/commit/?h=master-next&id=423c214817cfb7c96c198a873bcb56b498458fb9 > > With the fix: > > https://github.com/torvalds/linux/commit/1dd93f873d8ed8e5b228d1ae324b1f3c1e94bfa8 > > Can you give this patched kernel a try to see if it can fix your issue? > https://people.canonical.com/~phlin/kernel/lp-1837117-eeepc/ > > Thanks > > ** Changed in: linux-signed (Ubuntu) > Status: New => Incomplete > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1837117 > > Title: > Laptop backlight is off after system boot up > > Status in linux-signed package in Ubuntu: > Incomplete > > Bug description: > After kernel update the backlight on my Asus eeepc 1005px becomes off > during boot up. I can see the login screen if I point light to the > screen. The backlight is not reacting on brightness adjustment keys. > The backlight starts working only if I close and open the laptop lid. > > I have tried to: > * echo 10 > /sys/class/backlight/acpi_video0/brightness > * echo 125 > /sys/class/backlight/intel_backlight/brightness > * vbetool dpms on > * pass "acpi_backlight=vendor" kernel parameter > * install gdm instead of lightdm > * create /usr/share/X11/xorg.conf.d/80-backlight.conf with content > recommended in Kernel/Debugging/Backlight Wiki article > with no luck. > > The backlight works fine if I pass "acpi_osi=" kernel parameter, the > brightness is adjusted by keys, but the applet does not react to > adjustments. > > ProblemType: Bug > DistroRelease: Ubuntu 16.04 > Package: linux-image-4.4.0-145-generic 4.4.0-145.171 > ProcVersionSignature: Ubuntu 4.4.0-145.171-generic 4.4.176 > Uname: Linux 4.4.0-145-generic x86_64 > ApportVersion: 2.20.1-0ubuntu2.18 > Architecture: amd64 > CurrentDesktop: XFCE > Date: Thu Jul 18 22:30:44 2019 > InstallationDate: Installed on 2019-02-17 (151 days ago) > InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 > (20160719) > SourcePackage: linux-signed > UpgradeStatus: No upgrade log present (probably fresh install) > > To manage notifications about this bug go to: > > https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1837117/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1837117 Title: Laptop backlight is off after system boot up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1837117/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
