[Nouveau] [Bug 88272] [NVAC] Flickering screen on 1920x1080 monitor with 9400M in MacbookPro 5, 5

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88272

mbazzinotti at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mbazzinotti at gmail.com

--- Comment #5 from mbazzinotti at gmail.com ---
Created attachment 136253
  --> https://bugs.freedesktop.org/attachment.cgi?id=136253&action=edit
Bazz dmesg

On similar hardware, I am experiencing this display flicker with nouveau.

Macbook Pro 5,4 15" mid-2009
Nvidia GeForce 9400m
mini DisplayPort -> "Gigaware" DVI/HDMI/Displayport adapter -> using DVI port
 on the monitor.

--------
Software|
--------
Gentoo Linux 4.9.49 and 4.12.12. I recall this issue dating back to my use of
 3.18.11.
x11-base/xorg-server-1.19.5
x11-drivers/xf86-video-nouveau-1.0.15
No compositor
I've tested under XFCE4 or i3, the problem is the same.

kernel command line: ro root=PARTUUID=xxxxxxxx net.ifnames=0

-----------
Attachments|
-----------
bazz-dmesg.txt (dmesg command dump)
bazz-xrandr.txt (xrandr output)
bazz-vbios.rom

------
Issues|
------
1) intermittent flickering on the 2nd monitor.
2) If unplugging the mDP cable, the LVDS may flicker and the system appears
locked up (I cannot "blind" navigate to VT to reboot, like I usually do in
other circumstances). However, replugging the mDP cable will cease LVDS
flicker, although the system is still apparently rendered inoperable.

These problems do not occur when using the legacy nvidia-drivers (340.104).

Issue 1 is also experienced when booting to Virtual Terminal (VT) without
starting X. I have not experimented for Issue 2 on VT-only yet.

The DVI monitor is "usable" but experiences mild flicker and other times
frequent
flickering. It can appear stable for 30 seconds to a couple minutes at a time,
only to have flickering return.

--------------------------------
Commandline / Module Parameters |
--------------------------------
I played around with the following parameters.

drm_kms_helper.poll=0
noveau atomic, mst, runpm.

Playing with those settings have not made visible changes to the problem.

------
pstate|
------
`cat /sys/kernel/debug/dri/0/pstate`
03: core 125 MHz shader 250 MHz vdec 125 MHz
05: core 150 MHz shader 300 MHz vdec 150 MHz
0e: core 350 MHz shader 800 MHz vdec 350 MHz AC DC *
0f: core 450 MHz shader 1100 MHz vdec 450 MHz
AC: core 350 MHz shader 800 MHz vdec 350 MHz

pstate 03, 05 produce incredible constant flicker on the 2nd monitor.
pstate 0e, 0f produce intermittent flickering I've always been experiencing.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/nouveau/attachments/20171218/d165f112/attachment.html>