Hi Po-Hsu, Thank you very much for your reply.
No, I do not have NVIDIA graphic card, I only have an Intel integrated graphic card. Liwei > On Oct 6, 2019, at 10:47 PM, Po-Hsu Lin <po-hsu....@canonical.com> wrote: > > Do you have a NVIDIA graphic card on your laptop? (check it with "lspci" > command in a terminal) > If so, please try to install the proprietary video driver first to see if > this can solve your problem. > > ** Changed in: linux-signed-hwe (Ubuntu) > Status: New => Incomplete > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1846676 > > Title: > screen brightness cannot be adjusted > > Status in linux-signed-hwe package in Ubuntu: > Incomplete > > Bug description: > Changed the grub to acpi_backlight=vendor was not working. No file > showed under ls /sys/class/backlight > > Laptop Dell inspiron-3593 > > ProblemType: Bug > DistroRelease: Ubuntu 18.04 > Package: linux-image-5.0.0-29-generic 5.0.0-29.31~18.04.1 > ProcVersionSignature: Ubuntu 5.0.0-29.31~18.04.1-generic 5.0.21 > Uname: Linux 5.0.0-29-generic x86_64 > ApportVersion: 2.20.9-0ubuntu7.7 > Architecture: amd64 > CurrentDesktop: ubuntu:GNOME > Date: Fri Oct 4 00:21:51 2019 > InstallationDate: Installed on 2019-10-03 (1 days ago) > InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 > (20190805) > SourcePackage: linux-signed-hwe > UpgradeStatus: No upgrade log present (probably fresh install) > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1846676/+subscriptions -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1846676 Title: screen brightness cannot be adjusted To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1846676/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
