[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Zingam]

I have a Dell 7567 laptop with NVIDIA and Intel GPUs and a very bad screen 
tearing on Ubuntu 2004 and nothing seems to be able to fix it. Could something 
be done about that?
At least with the proprietary drivers I have multiple windows support (mostly 
99% of the time works).

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Zingam]

$ xrandr --prop | grep "PRIME Synchronization"
PRIME Synchronization: 0 
PRIME Synchronization: 1

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Tim Richardson]

Thanks Doug. On the W520, prime sync does work if you change the config.
This was an upgraded system so it had the old style config (in /etc/modprobe.d) 
and I missed the change. 
gdm3 works for me too on this one, although no external monitor attempted (but 
nvidia output to the laptop panel is definitely happening).

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Re: [Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Tim Richardson]

I didn't note the lack of a driver version. Thanks, I will check that.

On Thu, 19 Apr. 2018, 22:26 Doug McMahon, <1752...@bugs.launchpad.net>
wrote:

> @tim
> not sure if the ppa 390 driver was patched
> Works fine here either thru a conf using -
>   options nvidia_drm modeset=1
> or a grub option of -
>   nvidia-drm.modeset=1
> Note you don't specify driver version
>
> Additionally here only works with lightdm
>
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>
> Title:
>   PRIME Synchronization doesn't work with linux-kernel 4.15.
>
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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Doug McMahon]

@tim
not sure if the ppa 390 driver was patched
Works fine here either thru a conf using - 
  options nvidia_drm modeset=1
or a grub option of -
  nvidia-drm.modeset=1
Note you don't specify driver version

Additionally here only works with lightdm

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Tim Richardson]

I add to my report that it is also still broken on my Thinkpad P50, with the 
390.48 driver (I just updated everything). 
This bug needs to be reopened.

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Tim Richardson]

prime sync is still not working for me. It goes not enable and can not be 
enabled
I have a quadro 1000m on a thinkpad w520. Attached is the output from 
nvidia-bug-report.sh

** Attachment added: "nvidia-bug-report.log.gz"
   
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/+bug/1752739/+attachment/5121829/+files/nvidia-bug-report.log.gz

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Tim Richardson]

PS prime sync enabling is via modprobe.d file, the method I have always
used. I actually have the latest build from the ppa, so technically the
bug should be report there but it also existed yesterday when the
version of the driver was the same as currently in bionic.

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Doug McMahon]

see here concerning the  nvidia-prime window..
https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1758214

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Rocko]

@Roman: I got the same error about blacklist.nvidia missing when running
prime-select nvidia until I did an apt --purge remove nvidia-prime and
then apt install nvidia-prime. I think the package must have
accidentally left old code in place when it upgraded.

After that, I was able to change to use nvidia, but gdm still booted
into intel because nouveau and nvidia were both being loaded. I added a
conf file in /etc/modprobe.d containing "alias nouveau off" to fix that.

After that, gdm still fails to boot into nvidia (I get the same divide
by zero error as Doug does, see the log in comment #10). lightdm doesn't
crash but I only get a black screen so I can't log in to it.

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Roman Dinga]

For me even the new prime-select with a reboot doesn't work. It keeps
saying that Intel profile is selected, but keeps using Nvidia card. When
I try to switch to Nvidia, it throws a bunch of errors about file
blacklist.nvidia missing in /etc/modprobe.d. Anyway, I hope this Nvidia
mumbo-jumbo is restored back to sanity and Bumblebee can be used
again...

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Rocko]

@Doug re comment #10, I see exactly the same divide by zero error in the
syslog and gdm fails to boot when I prime-select nvidia. I'm using a
GP107M [GeForce GTX 1050 Mobile] card.

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Francois Thirioux]

No I do not have autologin.

As I wrote in ubuntuforums :
- added "nvidia-drm.modeset=1" in grub boot options
- got a Wayland session which runs Intel GPU (but Nvidia GPU is not powered off)
- got a X session which runs Nvidia GPU M1000M (with sync)

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Doug McMahon]

And obviously if a log out is attempted then that hangs.
Can try on a different Intel/nvidia combo I have

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Re: [Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Doug McMahon]

On 03/16/2018 06:21 AM, Alberto Milone wrote:
> I don't see any complaints from X11 in the log, but I do see Gnome shell
> crashing.
>
So on a hunch I set it to autologin, then it works fine.
It's possible the user reporting no issues with the quandro card had 
autologin, will try to confirm

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Alberto Milone]

I don't see any complaints from X11 in the log, but I do see Gnome shell
crashing.

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Doug McMahon]

whether of any value - it's been reported to me that with a Quadro M1000M gdm 
works fine
(- and user is presented with a wayland session option that uses intel
I don't see the wayland after nvidia driver is installed 
Card-1: Intel 4th Gen Core Processor Integrated Graphics Controller
Card-2: NVIDIA GK107M [GeForce GT 755M]

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Doug McMahon]

Fresh install couple of days old image
Update, reboot
Install the 390 driver
Reboot with kernel option nvidia-drm.modeset=1
Note: boot hangs at Ubuntu splash, nothing can be done, no tty's available. 
Only press power button to initiate shutdown works

** Attachment added: "journalctl.txt"
   
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/+bug/1752739/+attachment/5080892/+files/journalctl.txt

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Alberto Milone]

@Kirill: I haven't fixed prime-select yet. When I do, you will be able
to power off the discrete GPU.

@Doug: can you attach the output of journalctl after reproducing the
problem, please?

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Re: [Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Doug McMahon]

On 03/15/2018 04:24 PM, Kirill Romanov wrote:
> Still doesn't work for me.
>
Bug reports are poor place for troubleshooting, particularly when bug is 
fix released.
If inclined post in this thread at UF, provide
1. how are you trying to enable
2. your gpu info , inxi -G will suffice

post 32 shows kernel option, post 37 show using modprobe.d method, if 
you have a GeForce mobile nvidia card  you may need lightdm .
https://ubuntuforums.org/showthread.php?t=2385770=13748601=1#post13748601

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Kirill Romanov]

>sudo prime-select intel

Info: the current GL alternatives in use are: [None, None]
Info: the current EGL alternatives in use are: [None, None]
Error: the installed packages do not support PRIME
Error: intel mode can't be enabled

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Kirill Romanov]

Still doesn't work for me.

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Doug McMahon]

If others see then a new bug, meanwhile kernel log of fail on gdm3

** Attachment added: "kern.log"
   
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/+bug/1752739/+attachment/5080579/+files/kern.log

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Doug McMahon]

Well at least here on nvidia-755m if nvidia_drm modeset is enabled gdm3 fails 
to boot.
However lightdm works fine & prime sync is enabled..

$ sudo cat /sys/module/nvidia_drm/parameters/modeset
[sudo] password for doug: 
Y
doug@doug-Lenovo-IdeaPad-Y510P:~$ xrandr --verbose
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384
eDP-1-1 connected primary 1920x1080+0+0 (0x46) normal (normal left inverted 
right x axis y axis) 345mm x 194mm
Identifier: 0x42
Timestamp:  11726
Subpixel:   unknown
Gamma:  1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC:   0
CRTCs:  0 1 2
Transform:  1.00 0.00 0.00
0.00 1.00 0.00
0.00 0.00 1.00
   filter: 
EDID: 
000030e4d902
00150103802313780a15d59e59509826
0e50540001010101010101010101
0101010101017e3680b070381f403020
350059c21019
00fe004c
4720446973706c61790a202000fe
004c503135365746312d544c4232004b
PRIME Synchronization: 1 
supported: 0, 1

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Launchpad Bug Tracker]

This bug was fixed in the package nvidia-graphics-drivers-390 -
390.42-0ubuntu1

---
nvidia-graphics-drivers-390 (390.42-0ubuntu1) bionic; urgency=medium

  * New upstream release:
- Fixed a regression, introduced in 390.12, that caused occasional
  flicker when using the X driver's composition pipeline, for
  example when using screen transformations like rotation, or the
  "ForceCompositionPipeline" or "ForceFullCompositionPipeline"
  options."

  [ Alberto Milone ]
  * debian/dkms_nvidia/patches/buildfix_kernel_4.15.patch,
debian/templates/nvidia-dkms-flavour.install.in:
- Fix support for Linux 4.15 (LP: #1752739).
  * debian/templates/nvidia-kernel-source-flavour.install.in:
- Slim down the file, avoiding to list every single file.
  * debian/templates/control.in:
- Allow nvidia-dkms-390 to replace nvidia-384 (LP: #1753073).
  * debian/rules,
debian/templates/nvidia-compute-utils-flavour.install.in,

debian/templates/nvidia-compute-utils-flavour.nvidia-persistenced.service.in,
debian/templates/nvidia-dkms-flavour.install.in,
debian/templates/nvidia-dkms-flavour.nvidia-fallback.service.in:
- Make sure to enable both systemd services, and let dh_systemd
  do all the work.
- Install nvidia-fallback.service. This loads nouveau if nvidia
  fails to load.
- Remove any references to ld.so.conf.

  [ Rico Tzschichholz ]
  * debian/rules.defs:
- Use the no-compat32 binary for amd64.

 -- Alberto Milone   Wed, 14 Mar 2018
17:10:44 +0100

** Changed in: nvidia-graphics-drivers-390 (Ubuntu)
   Status: In Progress => Fix Released

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Alberto Milone]

prime-select is not supposed to work yet, and I am working on it. It is
a separate problem.

As for the main problem, I am going to fix it by patching the nvidia
driver for Linux 4.15.

** Changed in: nvidia-graphics-drivers-390 (Ubuntu)
   Status: Confirmed => In Progress

** Changed in: nvidia-graphics-drivers-390 (Ubuntu)
   Importance: Undecided => High

** Changed in: nvidia-graphics-drivers-390 (Ubuntu)
 Assignee: (unassigned) => Alberto Milone (albertomilone)

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: nvidia-graphics-drivers-390 (Ubuntu)
   Status: New => Confirmed

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Chris McDonough]

Given that even a PRIME switch requires a logout and a reboot isn't that much 
worse,
I think it's a reasonable workaround for initial release (not far away, and 
reading about the current state of affairs, probably too imminent to get PRIME 
working again) to require that folks switch drivers to intel via package 
management instead of PRIME.  The bare minimim would be to fix this minor bug:

https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-
drivers-390/+bug/175

This of course doesn't help the Wayland issue you mentioned.

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Title:
  PRIME Synchronization doesn't work with linux-kernel 4.15.

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Chris McDonough]

Thanks for the confirmation, Doug!  I'll read up on libglvnd to feel
less clueless.

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Title:
  PRIME Synchronization doesn't work with linux-kernel 4.15.

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Re: [Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Doug McMahon]

Chris, the Nvidia-prime deal is expected as prime-select isn't viable with
the switch to libglvnd. Whether a means to switch gpu's is going to be
provided I've no clue..
The loss of prime sync is a double whammy for hybrid device users,
especially in light of no apparent wayland support for such devices on the
Nvidia side.

On Mar 4, 2018 4:05 PM, "Chris McDonough"  wrote:

I can confirm the results of xrandr and dmesg|grep drm above with the
same kernel and nvidia driver versions on my system (a Thinkpad P50 with
an M2000M).

An additional symptom I have is that the nvidia-settings application no
longer supports PRIME at all; the PRIME Settings category in the
application just doesn't appear.  Here's the output when I start the
application.

$ nvidia-settings
** Message: 15:46:31.025: PRIME: No offloading required. Abort
** Message: 15:46:31.026: PRIME: is it supported? no

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Title:
  PRIME Synchronization doesn't work with linux-kernel 4.15.

Status in nvidia-graphics-drivers-390 package in Ubuntu:
  New

Bug description:
  I believe this issue is pretty well known, ex. here on optimus machine
  sudo cat /sys/module/nvidia_drm/parameters/modeset
  [sudo] password for doug:
  Y
  $ xrandr --prop | grep PRIME
PRIME Synchronization: 0  # this is the one needed to be 1
PRIME Synchronization: 1
PRIME Synchronization: 1

  Though suppport seems to be there
  $ dmesg |grep drm
  [1.863499] [drm] [nvidia-drm] [GPU ID 0x0100] Loading driver
  [1.863501] [drm] Initialized nvidia-drm 0.0.0 20160202 for
:01:00.0 on minor 0
  [1.873239] [drm] Memory usable by graphics device = 2048M
  [1.873244] fb: switching to inteldrmfb from EFI VGA
  [1.873323] [drm] Replacing VGA console driver
  [1.879334] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
  [1.879334] [drm] Driver supports precise vblank timestamp query.
  [1.908246] [drm] Initialized i915 1.6.0 20171023 for :00:02.0 on
minor 1
  [1.945491] fbcon: inteldrmfb (fb0) is primary device
  [1.945568] i915 :00:02.0: fb0: inteldrmfb frame buffer device


  bug report in arch
  https://bugs.archlinux.org/task/57305

  If I install the older 384 driver then again with kernel 4.15 no prime
  sync but with the 4.13 kernel it works fine

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Title:
  PRIME Synchronization doesn't work with linux-kernel 4.15.

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Chris McDonough]

Additonal notes because I know a similar symptom like the one I describe
in #1 can be caused by multiple issues.

- my system display BIOS is in Hybrid mode, and PRIME Settings do show
up in an Ubuntu 16.04 install I have on the same system.

- the selected driver is NVIDIA in Software and Updates -> Additional
Drivers.

- sudo prime-select intel has the following result

  # prime-select intel 
  Info: the current GL alternatives in use are: [None, None]
  Info: the current EGL alternatives in use are: [None, None]
  Error: the installed packages do not support PRIME
  Error: intel mode can't be enabled

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Title:
  PRIME Synchronization doesn't work with linux-kernel 4.15.

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[Bug 1752739] Re: PRIME Synchronization doesn't work with linux-kernel 4.15.

[Chris McDonough]

I can confirm the results of xrandr and dmesg|grep drm above with the
same kernel and nvidia driver versions on my system (a Thinkpad P50 with
an M2000M).

An additional symptom I have is that the nvidia-settings application no
longer supports PRIME at all; the PRIME Settings category in the
application just doesn't appear.  Here's the output when I start the
application.

$ nvidia-settings
** Message: 15:46:31.025: PRIME: No offloading required. Abort
** Message: 15:46:31.026: PRIME: is it supported? no

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Title:
  PRIME Synchronization doesn't work with linux-kernel 4.15.

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