Bug 187581

Summary:	Nouveau GPU Lock Up with 2D Acceleration
Product:	Drivers	Reporter:	Mingcong Bai (jeffbai)
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	NEW ---
Severity:	high	CC:	jeffbai
Priority:	P1
Hardware:	PPC-64
OS:	Linux
Kernel Version:	4.8.6	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	dmesg without nouveau.noaccel=1 dmesg with nouveau.noaccel=1 Kernel config (4.8.6)

Description Mingcong Bai 2016-11-13 23:13:58 UTC

Happened to get 2 FX4500's for my PowerMac G5 11,2, but it didn't seem willing to cooperate.

Without nouveau.noaccel=1 in the kernel parameter, the system starts fine, but X would only work with fbdev driver - as GPU locks up at early stages of startup (dmesg attached above).

With nouveau.noaccel=1 in the kernel parameter, system starts fine without the lock up message, but X will **still** only work with fbdev - using nouveau with result in a looped output of the following message:

"nouveau 0000:0a:00.0: DRM: 0x13DC: Parsing digital output script table"

And the system is inaccessible, this also appears to hang any `systemctl stop lightdm` operation and even the `reboot` command itself.

---------------------------

Xorg-Server version: 1.18.4
Kernel version: 4.8.6
xf86-video-nouveau version: 1.0.12

---------------------------

A similar bug report is filed here due to uncertainty on the origin of the issue.

Comment 1 Mingcong Bai 2016-11-13 23:14:23 UTC

Created attachment 244351 [details]
dmesg without nouveau.noaccel=1

Comment 2 Mingcong Bai 2016-11-13 23:14:39 UTC

Created attachment 244361 [details]
dmesg with nouveau.noaccel=1

Comment 3 Mingcong Bai 2016-11-13 23:15:44 UTC

Created attachment 244371 [details]
Kernel config (4.8.6)

Comment 4 Mingcong Bai 2016-11-13 23:16:23 UTC

Kernel binary can be obtained here: https://repo.aosc.io/os-ppc64/os3-dpkg/l/linux-kernel-4.8.6_4.8.6-0_ppc64.deb

Comment 5 Mingcong Bai 2016-11-13 23:17:27 UTC

Original Freedesktop.org bug report: https://bugs.freedesktop.org/show_bug.cgi?id=98712