Issue #3198 has been updated by yellowrabbit2010.

File IMG_20190727_194932_HDR.jpg added

Thanks! Yes, the trick with disabled acceleration allows to work without 
failures on the kernel 4685ca1cc305dbcd40d614ecc70f60a6a71ba453  :)

I, on the other hand, built the working kernels until March 20, 2019 
(v5.5.0-300-g2bbc7733d6) and am going to move on until I stop on the 
non-working kernel.

Of course, I’ll stop if you’re already clear about the reason for the failure:)

----------------------------------------
Bug #3198: OpenGL app crash with Radeon driver
http://bugs.dragonflybsd.org/issues/3198#change-13762

* Author: yellowrabbit2010
* Status: New
* Priority: High
* Assignee: 
* Category: Driver
* Target version: 
----------------------------------------
The programs I work with, namely, FreeCAD, Kicad, MPV, Chromium crash with 
``vm_fault: pager read error'' at different times, sometimes immediately after 
starting, sometimes after some manipulations.
I managed to repeat the situation on the configuration with minimal changes:
- I downloaded DragonFly-X86_64-LATEST.img.bz2 2019-07-16 03:56 285M
- installed it on 8G usb flash drive
- modify rc.conf and wpa_supplicant.conf in order to connect to WiFi
- pkg install Xorg mesa-demos
- added user rabbit
- startx 
- glxgears

Glxgears crushed immediately after start. Unfortunately, the test installation 
does not contain packages with debug information, so its core file is not very 
informative. But since the situation is always repeated, I built packages with 
debug information and made a screenshot of the gdb file with the downloaded 
core on the working machine (KERNCONF=X86_64_GENERIC).
I have to note that I use the core of the March version and it has no problems 
with graphics at all: there have been no failures for a long time with all the 
programs listed above. That is, it is unlikely that this is a video memory or 
swap file problem and so on.
= 5.5-DEVELOPMENT DragonFly v5.5.0.325.gf6792-DEVELOPMENT #25: Sun Mar 24 
09:54:07 VLAT 2019 =

I made an image of the flash drive immediately after the failure, you can 
download it from here 
https://yellowrabbit.gitlab.io/pub/bugs/dfly-glxgears.img.xz . There are no 
passwords neither for the rabbit user nor for root.








---Files--------------------------------
IMG_20190718_080950_HDR-min.jpg (1.83 MB)
Xorg.0.log (27.6 KB)
gdb-0.txt (558 Bytes)
messages (34.9 KB)
gdb-1.txt (2.72 KB)
gdb-1.png (394 KB)
glxgears.core.xz (298 KB)
IMG_20190724_210557_HDR-min.jpg (2.57 MB)
vga.txz (312 KB)
IMG_20190727_194932_HDR.jpg (4.11 MB)


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