Public bug reported: [Impact] We already added retry on the backlight driver, but the scalar have to take some time to activate panel during booting up, and 2 seconds seem doesn't enough. So, it sometimes fails to get the response from scalar.
[Fix] Enlarge the retry time from 2 seconds to 5 seconds. We didn't observe the response time longer than 3 seconds, but to be more confident, enlarge the value to 5 seconds. [Test] Verified on new Dell AIO platform. [Regression Potential] Low, increase the retry times doesn't hurt anything. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Affects: linux-oem-osp1 (Ubuntu) Importance: Undecided Status: New ** Affects: linux (Ubuntu Bionic) Importance: Undecided Status: New ** Affects: linux-oem-osp1 (Ubuntu Bionic) Importance: Undecided Status: New ** Affects: linux (Ubuntu Eoan) Importance: Undecided Status: New ** Affects: linux (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Eoan) Importance: Undecided Status: New ** Also affects: linux-oem-osp1 (Ubuntu) Importance: Undecided Status: New ** No longer affects: linux-oem-osp1 (Ubuntu Eoan) ** No longer affects: linux-oem-osp1 (Ubuntu Focal) -- 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/1862885 Title: Sometimes can't adjust brightness on Dell AIO Status in linux package in Ubuntu: New Status in linux-oem-osp1 package in Ubuntu: New Status in linux source package in Bionic: New Status in linux-oem-osp1 source package in Bionic: New Status in linux source package in Eoan: New Status in linux source package in Focal: New Bug description: [Impact] We already added retry on the backlight driver, but the scalar have to take some time to activate panel during booting up, and 2 seconds seem doesn't enough. So, it sometimes fails to get the response from scalar. [Fix] Enlarge the retry time from 2 seconds to 5 seconds. We didn't observe the response time longer than 3 seconds, but to be more confident, enlarge the value to 5 seconds. [Test] Verified on new Dell AIO platform. [Regression Potential] Low, increase the retry times doesn't hurt anything. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1862885/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp