[Bug 22726] New: Freeze using video-ati-6.12.1 and Thunderbird

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=22726

           Summary: Freeze using video-ati-6.12.1 and Thunderbird
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: arvidb at kth.se
         QAContact: xorg-team at lists.x.org


This is a bug first reported at Phoronix forums, see
http://www.phoronix.com/forums/showthread.php?t=14424 for the full story. The
reported solution works on my computer but probably not for many others with
the same problem.

---
I just stumbled upon this bug _in a repeatable way_, after updating my old
computer, switching from gnome to xfce4 and updating a lot of X-related
packages.

Now running (gentoo packages):
x11-base/xorg-server-1.5.3-r6
x11-base/xorg-x11-7.2
x11-drivers/xf86-video-ati-6.12.1-r1
x11-libs/gtk+-2.14.7-r2
xfce-base/xfce4-4.6.1

Default xorg.conf, no changes except setting Option "AccelMethod" "EXA".

Graphics card is R420 JI [Radeon X800PRO].
PCI bridge: nVidia Corporation nForce3 250Gb AGP Host to PCI Bridge (rev a2)

I created a new account on the computer, and while setting up Thunderbird for
the new user I "noticed" it always hung on the second page of the account
wizard - where you enter your name and email address. (Same symptoms as before:
dead keyboard, frozen screen except the mouse cursor moves around jerkily (a
few Hz update frequency of the position), SysRq working, nothing in the logs...
- the only dfference was this time it was repeatable.)

So I tried different combinations of settings in xorg.conf to get rid of it,
and -lo and behold- Option "AGPMode" "4" did the trick (I thought this was the
default?). At least I do no longer get the hang repeatably; perhaps it will
still hang sometimes. But this setting absolutely had some effect on this bug
for me.

I also tried "AGPFastWrite" "off", "GARTSize" "32", "MigrationHeuristics"
"greedy", "AccelDFS" "false", "DynamicClocks" "on"/"off" with no effect (didn't
test all combinations though).

Unfortunately, I'm quite sure I tried setting the AGPMode option the last time
I had the error, without effect. But perhaps it will give someone a clue.

Bridge info (I paste only what I believe is the the PCI-AGP bridge info, if
more is needed, please request it):

# lspci 
00:0b.0 PCI bridge: nVidia Corporation nForce3 250Gb AGP Host to PCI Bridge
(rev a2)

# lspci -vvn
00:0b.0 0604: 10de:00e2 (rev a2) (prog-if 00 [Normal decode])
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 16
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=10
        I/O behind bridge: 0000e000-0000efff
        Memory behind bridge: fde00000-fdefffff
        Prefetchable memory behind bridge: e0000000-efffffff
        Secondary status: 66MHz+ FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ <SERR- <PERR-
        BridgeCtl: Parity- SERR- NoISA- VGA+ MAbort- >Reset- FastB2B-
                PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-


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