Bug 595940

Summary:	sys-kernel/hardened-sources-4.7.6: nouveau fifo: CACHE_ERROR - ch 6 kwin_x11
Product:	Gentoo Linux	Reporter:	Oleksandr <alexander.persh>
Component:	Hardened	Assignee:	The Gentoo Linux Hardened Team <hardened>
Status:	RESOLVED OBSOLETE
Severity:	major	CC:	reagentoo
Priority:	Normal
Version:	unspecified
Hardware:	AMD64
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	dmesg output with errors

Description Oleksandr 2016-10-02 15:29:44 UTC

Created attachment 448838 [details]
dmesg output with errors

Hello!

I have issues with video card (Nvidia, G92 chip) operating on linux-4.7.5-hardened (btw on linux-4.4.8-hardened-r1 as well).

Strange behavior starts from login screen: once user password is entered, current screen disappear and I see a lot of squares for a split second. I have captured this on the video at https://youtu.be/gqX5Do9rbHM .

Then system works fine for some time, but starts freezing at random intervals (after 3 mins or 10 mins or 2 hours of work, etc) in random windows (chromium, krusader, login screen after auto-lock, etc) and a lot of artifacts appear. After about 30 secs it freezes completely. Any keyboard and mouse input stops so only hard reset helps. For example, here are several photos of my screen with artifacts:
http://imgur.com/a/lrY3j

I wrote a script that saves dmesg to a file each 10 secs. Please find its output, mentioning cache error, attached.

Here is my kernel config: https://paste.pound-python.org/raw/xO3Xl7hsmgP1Srjqz9po/ .

Looking forward to hearing from you soon. Thanks.