Public bug reported: 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. Some outputs from terminal: lshw -C video *-display description: VGA compatible controller product: RV516/M64-S [Mobility Radeon X2300] vendor: Advanced Micro Devices, Inc. [AMD/ATI] configuration: driver=radeon latency=0 uname -r 5.4.0-71-generic #79~18.04.1-Ubuntu lsb_release -rd Description: Ubuntu 18.04.5 LTS Release: 18.04 Package: xserver-xorg-video-radeon-hwe-18.04 Version: 1:19.1.0-1~18.04.1 Package: xserver-xorg-video-ati-hwe-18.04 Version: 1:19.1.0-1~18.04.1 I hope that you can help and fix it. I don't have this issue on Windows family system. Normally when I will boot my system or my display was turn off and next turn on I shouldn't notice flickering of my display but it is happen. This can be problem with radeon driver or linux kernel itself. I maked some videos from two machines with other operating systems. 1) Old notebook with Lubuntu 18.04: - booting (0:24 issue is shown): https://youtu.be/5ZfDxHV4A2s - turn off/turn on display (this same issue): https://youtu.be/Dn8WG-O2r10 2) Other machine with Ubuntu 18.04 this have also old Ati Radeon card: - booting (0:14 issue is shown): https://youtu.be/oZ2dCiHHB2Y - turn off/turn on display (this same issue): https://youtu.be/8s0sBYdnKzw You can see that both machines is affected by this same issue but in first machine this issue is most visible. I hope that this help and you can now fix this issue or report it. I think that this issue is for radeon driver but you maybe have more knowledge about it. I hope that you can help. If it is needed more information then you can ask me. P.S. I reported this same bug to linux kernel. Sorry for duplicate but I don't know if it is a problem with kernel or radeon driver. This is number of my duplicated bug #1917101 ** Affects: xserver-xorg-video-ati-hwe-18.04 (Ubuntu) Importance: Undecided Status: New ** 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. Some outputs from terminal: lshw -C video - *-display - description: VGA compatible controller - product: RV516/M64-S [Mobility Radeon X2300] - vendor: Advanced Micro Devices, Inc. [AMD/ATI] - configuration: driver=radeon latency=0 + *-display + description: VGA compatible controller + product: RV516/M64-S [Mobility Radeon X2300] + vendor: Advanced Micro Devices, Inc. [AMD/ATI] + configuration: driver=radeon latency=0 uname -r 5.4.0-71-generic #79~18.04.1-Ubuntu lsb_release -rd Description: Ubuntu 18.04.5 LTS Release: 18.04 Package: xserver-xorg-video-radeon-hwe-18.04 Version: 1:19.1.0-1~18.04.1 Package: xserver-xorg-video-ati-hwe-18.04 Version: 1:19.1.0-1~18.04.1 - - 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. Normally when I will boot my system or my display was turn off and next turn on I shouldn't notice flickering of my display but it is happen. - This can be problem with radeon driver or linux kernel itself. - I maked some videos from two machines with other operating systems. 1) Old notebook with Lubuntu 18.04: - booting (0:24 issue is shown): https://youtu.be/5ZfDxHV4A2s - turn off/turn on display (this same issue): https://youtu.be/Dn8WG-O2r10 2) Other machine with Ubuntu 18.04 this have also old Ati Radeon card: - booting (0:14 issue is shown): https://youtu.be/oZ2dCiHHB2Y - turn off/turn on display (this same issue): https://youtu.be/8s0sBYdnKzw You can see that both machines is affected by this same issue but in first machine this issue is most visible. I hope that this help and you can now fix this issue or report it. I think that this issue is for radeon driver but you maybe have more knowledge about it. + I hope that you can help. If it is needed more information then you can + ask me. - I hope that you can help. If it is needed more information then you can ask me. + P.S. I reported this same bug to linux kernel. Sorry for duplicate but I + don't know if it is a problem with kernel or radeon driver. This is + number of my duplicated bug #1917101 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924645 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/xserver-xorg-video-ati-hwe-18.04/+bug/1924645/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
