Screen flickers in Ubuntu 20.04

CHIRAG MEHTA

6/3/23, 3:32 AM

My screen flickers when I open the lid after having closed the lid earlier, it keeps on flickering and doesn't stop. It flickers even when I go to shell (Ctrl+Alt+F3), but if I lock it again (Super+L) and then unlock it, everything gets back to normal, rebooting works too.

I'm not able to understand the problem, or even where to begin with. I've looked at few similar questions on askubuntu to no avail, since the problem seems a bit different.

Another thing: I faced this problem months back in Ubuntu 21.10, but then I downgraded to ubuntu 20.04 and didn't get this problem until few days ago.

output of $ sudo lshw -c video

*-display                 
       description: Display controller
       product: Navi 14 [Radeon RX 5500/5500M / Pro 5500M]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:03:00.0
       version: c1
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi bus_master cap_list rom
       configuration: driver=amdgpu latency=0
       resources: irq:91 memory:d0000000-dfffffff memory:e0000000-e01fffff memory:fe500000-fe57ffff memory:fe580000-fe59ffff
  *-display
       description: VGA compatible controller
       product: Renoir
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:07:00.0
       version: c7
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix vga_controller bus_master cap_list
       configuration: driver=amdgpu latency=0
       resources: irq:52 memory:b0000000-bfffffff memory:c0000000-c01fffff ioport:e000(size=256) memory:fe400000-fe47ffff

I've shifted to kernel 5.11 and restored a snapshot to when I wasn't facing the problem, so far the problem hasn't surfaced again, I'll update if I face the problem again

0 + 0

flicker

20.04

elmclose

6/3/23, 10:44 AM

Sounds like a problem with your hardware. Can you provide some system details.

CHIRAG MEHTA

6/3/23, 4:48 PM

@elmclose I've added some more info, also I was using kernel 5.13. Let me know if I need to add more details, specific commands would help.

elmclose

6/3/23, 8:42 PM

If the flickering comes back try turning off the compositor. See this post for more detail https://askubuntu.com/questions/1241696

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Screen flickers in Ubuntu 20.04

TH: หน้าจอกะพริบใน Ubuntu 20.04

RO: Ecranul pâlpâie în Ubuntu 20.04

RU: Мерцание экрана в Ubuntu 20.04

VI: Màn hình nhấp nháy trong Ubuntu 20.04

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.