[Bug 101732] Thames GPU - radeon 0000:01:00.0: failed to get a new IB (-35)

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=101732

            Bug ID: 101732
           Summary: Thames GPU - radeon 0000:01:00.0: failed to get a new
                    IB (-35)
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: fedevx@yahoo.com

Created attachment 132578
  --> https://bugs.freedesktop.org/attachment.cgi?id=132578&action=edit
Excerpt of journalctl -b -l | grep radeon

Environment info:

OS: Arch
xf86-video-ati: 1:7.9.0-1
Kernel: 4.11.9-1
Running Gnome on Wayland (the issue happens with Xorg too).

#############
lspci | grep -i radeon:

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Thames [Radeon HD 7500M/7600M Series]
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Turks HDMI Audio
[Radeon HD 6500/6600 / 6700M Series]
#############
hwinfo --gfxcard

21: PCI 100.0: 0300 VGA compatible controller (VGA)
  [Created at pci.378]
  Unique ID: VCu0.dkF2+KIVH8C
  Parent ID: vSkL.zuRwVyuZRN1
  SysFS ID: /devices/pci0000:00/0000:00:01.0/0000:01:00.0
  SysFS BusID: 0000:01:00.0
  Hardware Class: graphics card
  Model: "Toshiba America Info Radeon HD 7670M"
  Vendor: pci 0x1002 "ATI Technologies Inc"
  Device: pci 0x6840 "Thames [Radeon HD 7500M/7600M Series]"
  SubVendor: pci 0x1179 "Toshiba America Info Systems"
  SubDevice: pci 0xfb81 "Radeon HD 7670M"
  Driver: "radeon"
  Driver Modules: "drm"
  Memory Range: 0xb0000000-0xbfffffff (ro,non-prefetchable)
  Memory Range: 0xc0000000-0xc001ffff (rw,non-prefetchable)
  I/O Ports: 0x3000-0x30ff (rw)
  Memory Range: 0xc0040000-0xc005ffff (ro,non-prefetchable,disabled)
  IRQ: 25 (44749 events)
  Module Alias: "pci:v00001002d00006840sv00001179sd0000FB81bc03sc00i00"
  Driver Info #0:
    Driver Status: radeon is active
    Driver Activation Cmd: "modprobe radeon"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #18 (PCI bridge)

Primary display adapter: #21
#############

I receive the errors as per the attached logs. I do see them sometimes at boot,
about the time plymouth is about to kick in but most of the time I can
reproduce the issue by giving the GPU some work.

For example, I can trigger the issue by running:

vblank_mode=0 glxgears

After 10 to 15 seconds, the screen would then freeze. Then go blank as it was
trying to reset itself then display the screen again before starting another
reset loop. The system is then not responsive unless via SSH, which I then use
to restart the display-manager service. Upon restarting it, the screen either
is full of white noise (can't see anything but noise in it) or it has a frozen
image of what it was there when the lockup happened. The mouse pointer is still
visible and responding.

Looking at other bugs, this could be related to
https://bugs.freedesktop.org/show_bug.cgi?id=67722 though the GPU is different.
I'm booting with radeon.dpm=1. Booting without that option renders the screen
unusable (https://bugzilla.kernel.org/show_bug.cgi?id=82431).

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