[Bug 77784] New: Certain mono based games hang the system with radeonsi (probably llvm backend)

* [Bug 77784] New: Certain mono based games hang the system with radeonsi (probably llvm backend)
@ 2014-04-22 21:23 bugzilla-daemon
  2014-04-22 21:38 ` [Bug 77784] " bugzilla-daemon
                   ` (10 more replies)
  0 siblings, 11 replies; 12+ messages in thread
From: bugzilla-daemon @ 2014-04-22 21:23 UTC (permalink / raw)
  To: dri-devel

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https://bugs.freedesktop.org/show_bug.cgi?id=77784

          Priority: medium
            Bug ID: 77784
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Certain mono based games hang the system with radeonsi
                    (probably llvm backend)
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: j.suarez.agapito@gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

My system specs are as follows (taken from Steam system information):

Processor Information:
    Vendor:  AuthenticAMD
    CPU Family:  0x15
    CPU Model:  0x1
    CPU Stepping:  0x2
    CPU Type:  0x0
    Speed:  3600 Mhz
    8 logical processors
    8 physical processors
    HyperThreading:  Unsupported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Supported
    SSE41:  Supported
    SSE42:  Supported

Network Information:
    Network Speed:  

Operating System Version:
    Ubuntu 14.04 LTS (64 bit)
    Kernel Name:  Linux
    Kernel Version:  3.15.0-031500rc2-generic
    X Server Vendor:  The X.Org Foundation
    X Server Release:  11501000
    X Window Manager:  KWin
    Steam Runtime Version:  steam-runtime-release_2014-02-05

Video Card:
    Driver:  X.Org Gallium 0.4 on AMD PITCAIRN

    Driver Version:  3.0 Mesa 10.2.0-devel (git-7cb3bbf trusty-oibaf-ppa)
    OpenGL Version: 3.0
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 60 Hz
    VendorID:  0x1002
    DeviceID:  0x6818
    Number of Monitors:  1
    Number of Logical Video Cards:  1
    Primary Display Resolution:  1920 x 1080
    Desktop Resolution: 1920 x 1080
    Primary Display Size: 18,78" x 10,55"  (21,54" diag)
                                            47,7cm x 26,8cm  (54,7cm diag)
    Primary VRAM Not Detected

Sound card:
    Audio device: Realtek ALC889

Memory:
    RAM:  15865 Mb

Miscellaneous:
    UI Language:  English
    LANG:  es_ES.UTF-8
    Microphone:  Not set
    Total Hard Disk Space Available:  469324 Mb
    Largest Free Hard Disk Block:  35328 Mb

Installed software:

Recent Failure Reports:

GPU is a Radeon HD 7870, using radeonsi git 2014.04.21 (7cb3bbf) from oibaf ppa
recompiled with llvm 3.5 (svn 206757).

Even after bug #60929 was fixed I have been experiencing system hangs with
LITTLE Racers Street, which is based on mono. The hang usually happens randomly
after a few races have been played and results in the image in the screen
getting its colors corrupted (just like when in old times you changed the color
depth in windows 95 -I'll try to get a picture with a camera because the system
is hard locked-) and a loop in the sound. So just a hard lock.

I did not know what was to blame and was waiting for a game update in order to
see if things got solved.

However, I have recently bought Foosball Street Edition (also based on mono).
The game launches and shows the menus OK, but hangs the system at about 5-10
secs after the kick-off of any match. The hang is not like LITTLE Racers
Street, but rather like a series of GPU hangs and recoveries (screen goes black
and then shows the game a few times in a row) which end up in the system
totally frozen. During that time there is no sound playing. So probably not a
lock as hard as in LITTLE Racers Street.

I'm not sure how to debug this but I am quite convinced that this could be
another case of mono + llvm backend incompatibility. The reason for that belief
is that (i) I have tested this game on this same PC with catalyst and the game
does not hang and everything works wonderfully, (ii) I obtained the same good
results in a laptop with a Radeon HD 4570 (r600g, not llvm) (mesa git from
around 10 April); and (iii) both games are based on mono.

As stated above, I'm not sure how to debug this because when the system hangs,
it does not allow VT switching to check the logs or the dmesg output. I would
be happy to help with any further information needed.

Regards

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