Bug 202657 - amdgpu.dc=0 coupled with amdgpu.audio=0 causes fullscreen flickering with dvi-d to vga monitor setup (Polaris)
Summary: amdgpu.dc=0 coupled with amdgpu.audio=0 causes fullscreen flickering with dvi...
Status: NEW
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: All Linux
: P1 enhancement
Assignee: drivers_video-dri
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-02-23 17:35 UTC by siyia
Modified: 2019-06-15 07:25 UTC (History)
1 user (show)

See Also:
Kernel Version: All
Subsystem:
Regression: No
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Description siyia 2019-02-23 17:35:51 UTC 
Hello i discovered, that when using "amdgpu.dc=0 amdgpu.audio=0" krenel parameters in a dvi-d to vga monitor setup i get screen flickering with full screen video players and redshift.If i use only "amdgpu.dc=0" there is no screen flickering but hdmi audio is enabled (which is useless in my setup)

gpu: RX 550
Comment 1 Alex Deucher 2019-02-23 21:58:08 UTC 
If you are using DVI or VGA, audio is irrelevant anyway so why do you care about the audio option?
Comment 2 siyia 2019-02-23 22:03:29 UTC 
because pulse audio always defaults to hdmi-audio first
Comment 3 siyia 2019-02-23 23:28:57 UTC 
ok i used the "pactl unload-module" option at startup to unload hdmi device, but
it took me a while to figure it out, anyways a clean flicker-free kernel option to disable hdmi would be preferable instead of trying to hack pulseaudio.
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