This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- disco' to 'verification-done-disco'. If the problem still exists, change the tag 'verification-needed-disco' to 'verification-failed-disco'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-disco -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1837117 Title: EeePC 1005px laptop backlight is off after system boot up Status in linux package in Ubuntu: Fix Released Status in linux source package in Xenial: Fix Committed Status in linux source package in Disco: Fix Committed Status in linux source package in Eoan: Fix Released Bug description: == SRU Justification == Commit 78f3ac76d9e5 ("platform/x86: asus-wmi: Tell the EC the OS will handle the display off hotkey") causes the backlight to be permanently off on various EeePC laptop models using the eeepc-wmi driver (Asus EeePC 1015BX, Asus EeePC 1025C). == Fix == * 1dd93f87 (platform/x86: asus-wmi: Only Tell EC the OS will handle display hotkeys from asus_nb_wmi) This patch addes a .wmi_backlight_set_devstate quirk for specific models to make asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, 2, NULL) conditional. Only X/D contain the commit that introduce this issue (78f3ac76), this patch can be cherry-picked into D. For X, it needs some content adjustment to add quirks only to those models that exist in Xenial tree. == Test == Test kernels could be found here: https://people.canonical.com/~phlin/kernel/lp-1837117-eeepc/ Bug reporter has verified that this fix works as expected on X. == Regression Potential == Low, quirks limited to specific ASUS laptops and by far there is no further change to this in upstream kernel. == Original Bug Report == 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/+bug/1837117/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp