*** This bug is a duplicate of bug 1917101 ***
https://bugs.launchpad.net/bugs/1917101
I marked this like duplicate because it is duplicate in real. Very sorry
for problem.
** 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: 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
** This bug has been marked a duplicate of bug 1917101
Booting into desktop results in flickering (also when I turn off and next
turn on display)
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https://bugs.launchpad.net/bugs/1924645
Title:
Booting into desktop results in flickering (also when I turn off and
next turn on display)
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