[Bug 561554] [NEW] [KMS] Desktop freeze + radeon IB schedule errors

[Ancoron Luziferis]

Public bug reported:

Upgrading the kernel from 2.6.32-19-generic to 2.6.32-20-generic
resulted in a desktop freeze after just 30 minutes of work.

$ uname -a
Linux purgatory 2.6.32-20-generic #29-Ubuntu SMP Fri Apr 9 20:35:00 UTC 2010 x86_64 GNU/Linux

$ lsmod | egrep '(radeon|fb)'
fbcon                  39270  72 
tileblit                2487  1 fbcon
font                    8053  1 fbcon
bitblit                 5811  1 fbcon
vga16fb                12757  0 
vgastate                9857  1 vga16fb
radeon                739547  2 
ttm                    60815  1 radeon
drm_kms_helper         30710  1 radeon
drm                   198866  4 radeon,ttm,drm_kms_helper
i2c_algo_bit            6024  1 radeon

The card is a ATI Radeon X1550:

01:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV505 CE [Radeon X1550 64-bit] [1002:715f]
        Subsystem: Micro-Star International Co., Ltd. Device [1462:0680]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 26
        Region 0: Memory at e0000000 (64-bit, prefetchable) [size=256M]
        Region 2: Memory at fdff0000 (64-bit, non-prefetchable) [size=64K]
        Region 4: I/O ports at ee00 [size=256]
        Expansion ROM at fdfc0000 [disabled] [size=128K]
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [58] Express (v1) Endpoint, MSI 00
                DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <4us, L1 unlimited
                        ExtTag+ AttnBtn- AttnInd- PwrInd- RBE- FLReset-
                DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
                        RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
                        MaxPayload 128 bytes, MaxReadReq 128 bytes
                DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
                LnkCap: Port #0, Speed 2.5GT/s, Width x16, ASPM L0s L1, Latency L0 <64ns, L1 <1us
                        ClockPM- Suprise- LLActRep- BwNot-
                LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
        Capabilities: [80] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable+
                Address: 00000000fee0100c  Data: 4189
        Kernel driver in use: radeon
        Kernel modules: radeon

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: drm lucid

-- 
[KMS] Desktop freeze + radeon IB schedule errors
https://bugs.launchpad.net/bugs/561554
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