就像标题所说的那样，我无法找到强制我的笔记本电脑使用 PRIME 同步的方法，而且据我所知，这很可能是我在观看视频时出现大量屏幕撕裂的原因。
我几乎尝试了所有我能找到的最新方法，但都不起作用。
我已确保 drm 文件配置正确：
(base) alex@alex:/etc/modprobe.d$ cat nvidia-drm.conf
options nvidia-drm modeset=1
我尝试强制执行它，xrandr --output eDP-1-1 --set "PRIME Synchronization" 1但它仍然保持在 0。
我确保执行以下命令并重新启动：
(base) alex@alex:/etc/modprobe.d$ sudo update-initramfs -u
[sudo] password for alex:
update-initramfs: Generating /boot/initrd.img-5.3.0-24-generic
I: The initramfs will attempt to resume from /dev/nvme0n1p4
I: (UUID=4ef37681-250c-4d75-954b-c8cf78fd5e65)
I: Set the RESUME variable to override this.
*当我尝试同样的事情但通过创建一个 zz-nvidia-modesetconf 文件时，就像我在一些帖子上读到的那样，update-initramfs 命令产生了很多错误。
经过所有这些，我仍然得到以下结果：
(base) alex@alex:/etc/modprobe.d$ sudo cat /sys/module/nvidia_drm/parameters/modeset
N
我有一台配备 GTX 1050 ti 卡的 Dell xps 9570，并且运行的是 Ubuntu 19.10。
这里还有一些有用的输出（我的显示器是 eDP-1-1）：
base) alex@alex:/etc/modprobe.d$ xrandr --prop
Screen 0: minimum 8 x 8, current 2560 x 1440, maximum 32767 x 32767
eDP-1-1 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
_MUTTER_PRESENTATION_OUTPUT: 0
EDID:
00ffffffffffff004d108d1400000000
051c0104a52213780eef4fa95334bc25
0d515400000001010101010101010101
0101010101014dd000a0f0703e803020
350058c2100000180000000000000000
00000000000000000000000000fe0046
4e564452804c51313536443100000000
0002410328011200000b010a2020004c
PRIME Synchronization: 0
supported: 0, 1
scaling mode: Full aspect
supported: Full, Center, Full aspect
max bpc: 12
range: (6, 12)
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
link-status: Good
supported: Good, Bad
CONNECTOR_ID: 86
supported: 86
non-desktop: 0
range: (0, 1)
3840x2160 60.00 + 59.98 59.97
3200x1800 59.96 59.94
2880x1620 59.96 59.97
2560x1600 59.99 59.97
2560x1440 59.99 59.99* 59.96 59.95
2048x1536 60.00
1920x1440 60.00
1856x1392 60.01
1792x1344 60.01
2048x1152 59.99 59.98 59.90 59.91
1920x1200 59.88 59.95
1920x1080 60.01 59.97 59.96 59.93
1600x1200 60.00
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1440x900 59.89
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1360x768 59.80 59.96
1280x800 59.99 59.97 59.81 59.91
1152x864 60.00
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
800x512 60.17
700x525 59.98
800x450 59.95 59.82
640x512 60.02
720x450 59.89
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
680x384 59.80 59.96
640x400 59.88 59.98
576x432 60.06
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
DP-1-1 disconnected (normal left inverted right x axis y axis)
PRIME Synchronization: 1
supported: 0, 1
Content Protection: Undesired
supported: Undesired, Desired, Enabled
max bpc: 12
range: (6, 12)
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
link-status: Good
supported: Good, Bad
CONNECTOR_ID: 92
supported: 92
non-desktop: 0
range: (0, 1)
DP-1-2 disconnected (normal left inverted right x axis y axis)
PRIME Synchronization: 1
supported: 0, 1
Content Protection: Undesired
supported: Undesired, Desired, Enabled
max bpc: 12
range: (6, 12)
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
link-status: Good
supported: Good, Bad
CONNECTOR_ID: 100
supported: 100
non-desktop: 0
range: (0, 1)
DP-1-3 disconnected (normal left inverted right x axis y axis)
PRIME Synchronization: 1
supported: 0, 1
Content Protection: Undesired
supported: Undesired, Desired, Enabled
max bpc: 12
range: (6, 12)
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
link-status: Good
supported: Good, Bad
CONNECTOR_ID: 106
supported: 106
non-desktop: 0
range: (0, 1)
(base) alex@alex:/etc/modprobe.d$ dmesg | grep drm
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-5.3.0-24-generic root=UUID=3aed6bfe-476b-4f03-a33a-8265acaf1a5a ro quiet splash acpi_rev_override=1 acpi_osi=Linux nouveau.modeset=0 pcie_aspm=force drm.vblankoffdelay=1 scsi_mod.use_blk_mq=1 nouveau.runpm=0 mem_sleep_default=deep pti=off spectre_v2=off l1tf=off nospec_store_bypass_disable no_stf_barrier vt.handoff=7
[ 0.131737] Kernel command line: BOOT_IMAGE=/vmlinuz-5.3.0-24-generic root=UUID=3aed6bfe-476b-4f03-a33a-8265acaf1a5a ro quiet splash acpi_rev_override=1 acpi_osi=Linux nouveau.modeset=0 pcie_aspm=force drm.vblankoffdelay=1 scsi_mod.use_blk_mq=1 nouveau.runpm=0 mem_sleep_default=deep pti=off spectre_v2=off l1tf=off nospec_store_bypass_disable no_stf_barrier vt.handoff=7
[ 3.004066] [drm] Incompatible option detected: enable_guc=3, GuC submission not supported!
[ 3.004066] [drm] Switching to non-GuC submission mode!
[ 3.004671] fb0: switching to inteldrmfb from EFI VGA
[ 3.016968] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 3.016969] [drm] Driver supports precise vblank timestamp query.
[ 3.024951] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
[ 3.096695] [drm] HuC: Loaded firmware i915/kbl_huc_ver02_00_1810.bin (version 2.0)
[ 3.107310] [drm] GuC: Loaded firmware i915/kbl_guc_32.0.3.bin (version 32.0)
[ 3.107444] [drm] CT: enabled
[ 3.137213] [drm] Initialized i915 1.6.0 20190619 for 0000:00:02.0 on minor 0
[ 3.376284] [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
[ 3.376286] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on minor 1
[ 3.413727] fbcon: i915drmfb (fb0) is primary device
[ 3.413802] i915 0000:00:02.0: fb0: i915drmfb frame buffer device
(base) alex@alex:/etc/modprobe.d$ nvidia-smi
Sat Dec 7 13:10:10 2019
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 435.21 Driver Version: 435.21 CUDA Version: 10.1 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GTX 105... Off | 00000000:01:00.0 Off | N/A |
| N/A 44C P8 N/A / N/A | 600MiB / 4042MiB | 31% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 1520 G /usr/lib/xorg/Xorg 72MiB |
| 0 2495 G /usr/lib/xorg/Xorg 137MiB |
| 0 2768 G /usr/bin/gnome-shell 207MiB |
| 0 3410 G ...quest-channel-token=2905873432716077065 133MiB |
+-----------------------------------------------------------------------------+
任何想法都非常感谢，谢谢！
答案1
我在运行 Ubuntu 18.04 的配备 GTX 1050 Ti 的 Dell XPS 9570 上测试了此解决方案，并且有效。
sudo update-initramfs -u/etc/default/grub通过运行进行修改sudo nano /etc/default/grub- 更改
GRUB_CMDLINE_LINUX_DEFAULT=行以包含设置nvidia-drm.modeset=1 - 如果该行是，
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"那么您将其更改为GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nvidia-drm.modeset=1"
- 更改
sudo update-grub- 重启
如果您想在修改 grub 之前先尝试这一点，您可以在启动机器时从 grub 菜单中编辑启动选项。