** Description changed: Dear Launchpad Community, I have problem with my display on all version of Ubuntu system. It doesn't matter what version I will install. I checked this on Ubuntu 18.04.5, Ubuntu 20.04, Ubuntu 20.04.1, Lubuntu 18.04.5. My screen is - flashing for one second when I boot my system or if I will logout from - the session. This same problem when I will log in to the session. My - screen is flashing (white image) for one second. What is a problem? I - think that this can be driver problem or with kernel itself. I have this - same problem on other computer. On both computers I have Radeon graphic - card. + flashing for one second when I boot my system or if I will turn off and + next turn on my display. My screen is flashing (white image) for one + second. What is a problem? I think that this can be driver problem or + with kernel itself. I have this same problem on other computer. On both + computers I have Radeon graphic card. Some outputs from terminal: lshw -C video *-display - description: VGA compatible controller - product: RS880M [Mobility Radeon HD 4225/4250] - vendor: Advanced Micro Devices, Inc. [AMD/ATI] + description: VGA compatible controller + product: RS880M [Mobility Radeon HD 4225/4250] + vendor: Advanced Micro Devices, Inc. [AMD/ATI] configuration: driver=radeon latency=0 uname -ar 5.4.0-66-generic #74~18.04.2-Ubuntu x86_64 GNU/Linux lsb_release -rd Description: Ubuntu 18.04.5 LTS Release: 18.04 Package: linux-hwe-5.4-headers-5.4.0-66/bionic-updates,bionic-updates,bionic-security,bionic-security,now 5.4.0-66.74~18.04.2 - - I hope that you can help and fix it. I don't have this issue on Windows family system. + I hope that you can help and fix it. I don't have this issue on Windows + family system. I founded on askubuntu some solution. I can add to the GRUB nomodeset option and this help me for the one of the machines. Flickers is gone but system works slower and with lower resolution. On my machine with RS880M this option is not possible because this cause problems with my hardware and I can see artefacts so I will not try use this nomodeset option anymore. - - I found Bug #1838644 and I have this same problem like more users in the past. I am on 5.4.0-66 kernel like you can see above. + I found Bug #1838644 and I have this same problem like more users in the + past. I am on 5.4.0-66 kernel like you can see above. Normally when I will boot my system or logout from the session I shouldn't notice flickering of my display but it is happen.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1917101 Title: Booting into desktop results in flickering (also when I turn off and next turn on display) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.4/+bug/1917101/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
