@Ho Cheung, Could you provide more information about the OS environment? For example the sosreport output that included ubuntu version, kernel version, amdgpu version ...)
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to ubuntu-drivers-common in Ubuntu. https://bugs.launchpad.net/bugs/1835996 Title: Dell Precision 7730 - The screen will be flickering after resumed from "display sleep" (ONLY occurs on AUO UHD#8CJK2 panel) Status in ubuntu-drivers-common package in Ubuntu: New Bug description: [Summary] Dell Precision 7730 - The screen will be flickering after resumed from "display sleep" (ONLY occurs on AUO UHD#8CJK2 panel) [Reproduce Steps] 1. Install Ubuntu 16.04/18.04 on Precision 7730; 2. Disable automatic system sleep; 3. Wait for display to enter sleep; 4. Resume from display sleep. [Results] Expected: The screen wakes up as normal; Actual: The screen is flickering. [Additional Information] 1. This bug can be reproduced both Dell OEM Ubuntu 16.04 image and Canonical Ubuntu 16.04 image (Default video driver/firmware version is 390.25); 2. This bug still can be reproduced on Ubuntu 18.04; 3. "apt-get install nvidia current", the video driver/firmware version 304.135 will be installed. This bug does not appear with this driver; 4. Also tested version 331 (working properly) and version 384 (This bug can be reproduced.); 5. This bug does not appear on external monitors (working properly via WD15 and directly attached); 6 Same behavior with BIOS 1.4.2; 7. Similar behavior with RHEL Enterprise Linux Developer Workstation 7.5 64bit -> No video at all when attempting to resume from display sleep or system sleep; 8. System is working properly using Windows 10 Pro 64bit; 9. More information from customer: https://www.dell.com/community/XPS/Precision-7730-display-lined-flickering-in-BIOS-DO-NOT-BUY/td-p/6219020 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1835996/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
