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I recently purchased a hybrid gaming laptop with Intel graphics and an NVIDIA GTX 1660ti.
I'm using "Dynamic" graphics (as listed in bios,) so my display is controlled by xf86-video-intel with prime-run offloading to the NVIDIA card (with driver version 465.31-12) when running games.
Both cards are detected successfully
[collin@ranma ~]$ xrandr --listproviders
Providers: number : 2
Provider 0: id: 0x45 cap: 0xb, Source Output, Sink Output, Sink Offload crtcs: 4 outputs: 2 associated providers: 1 name:Intel
Provider 1: id: 0x220 cap: 0x2, Sink Output crtcs: 4 outputs: 3 associated providers: 1 name:NVIDIA-G0
I have enabled DRM enabled through a grub kernel parameter, and it's on.
[collin@ranma ~]$ sudo cat /sys/module/nvidia_drm/parameters/modeset
Y
However, in certain 2D games, there's noticeable jitter/stuttering when graphics are scrolling when using prime-run (which is not there when rendering using the Intel card.)
Additionally, PRIME synchronization is not available on my laptop display, but it's listed on other inactive displays.
[collin@ranma ~]$ xrandr --props
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 380mm x 210mm
EDID:
00ffffffffffff0009e5380800000000
011c0104a526157803c810a457519b27
0e505400000001010101010101010101
010101010101c23680cc703814406c30
aa007ed71000001a0000000000000000
00000000000000000000000000fe0042
4f452048460a202020202020000000fe
004e5631373346484d2d4e34370a005a
BACKLIGHT: 1778
range: (0, 26666)
Backlight: 1778
range: (0, 26666)
scaling mode: Full aspect
supported: Full, Center, Full aspect
Colorspace: Default
supported: Default, RGB_Wide_Gamut_Fixed_Point, RGB_Wide_Gamut_Floating_Point, opRGB, DCI-P3_RGB_D65, BT2020_RGB, BT601_YCC, BT709_YCC, XVYCC_601, XVYCC_709, SYCC_601, opYCC_601, BT2020_CYCC, BT2020_YCC
max bpc: 12
range: (6, 12)
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
panel orientation: Normal
supported: Normal, Upside Down, Left Side Up, Right Side Up
link-status: Good
supported: Good, Bad
non-desktop: 0
range: (0, 1)
1920x1080 60.00*+
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
non-desktop: 0
supported: 0, 1
DP-1-0 disconnected (normal left inverted right x axis y axis)
PRIME Synchronization: 1
supported: 0, 1
CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0
0 1
CscMatrix: 65536 0 0 0 0 65536 0 0 0 0 65536 0
BorderDimensions: 4
supported: 4
Border: 0 0 0 0
range: (0, 65535)
SignalFormat: DisplayPort
supported: DisplayPort
ConnectorType: DisplayPort
ConnectorNumber: 0
_ConnectorLocation: 0
non-desktop: 0
supported: 0, 1
DP-1-1 disconnected (normal left inverted right x axis y axis)
PRIME Synchronization: 1
supported: 0, 1
CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0
0 1
CscMatrix: 65536 0 0 0 0 65536 0 0 0 0 65536 0
BorderDimensions: 4
supported: 4
Border: 0 0 0 0
range: (0, 65535)
SignalFormat: TMDS
supported: TMDS
ConnectorType: DisplayPort
ConnectorNumber: 0
_ConnectorLocation: 0
non-desktop: 0
supported: 0, 1
HDMI-1-0 disconnected (normal left inverted right x axis y axis)
PRIME Synchronization: 1
supported: 0, 1
CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0
0 1
CscMatrix: 65536 0 0 0 0 65536 0 0 0 0 65536 0
BorderDimensions: 4
supported: 4
Border: 0 0 0 0
range: (0, 65535)
SignalFormat: TMDS
supported: TMDS
ConnectorType: HDMI
ConnectorNumber: 1
_ConnectorLocation: 1
non-desktop: 0
supported: 0, 1
Notice how eDP1 is the only output without PRIME synchronization listed. Attempting to set it anyway throws an error.
[collin@ranma ~]$ xrandr --output eDP1 --set 'PRIME Synchronization' '1'
X Error of failed request: BadName (named color or font does not exist)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 11 (RRQueryOutputProperty)
Serial number of failed request: 51
Current serial number in output stream: 51
I'm a bit confused on how PRIME Synchronization is supposed to work, but regardless, 2D games have jittery scrolling with prime-run. Is there any way to fix this?
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Remove xf86-video-intel it's generally buggy/in development limbo and the modesetting driver better tested with PRIME setups
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I'm still having some issues; I've removed the Intel driver, but PRIME Synchronization still cannot be enabled. I'm not sure what could be causing it to not work.
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