Re: [patch] PM: suspend/resume debugging should depend on SOFTWARE_SUSPEND

From: Rafael J. Wysocki
Date: Sat Nov 25 2006 - 12:35:26 EST


Hi,

On Saturday, 25 November 2006 15:11, Mike Galbraith wrote:
> On Fri, 2006-11-24 at 10:08 -0800, Linus Torvalds wrote:
> >
> > On Fri, 24 Nov 2006, Mike Galbraith wrote:
> > >
> > > I tried the dynticks/hires-timers/kbd suggestion, no difference. It
> > > still boots in medicated snail mode, and emits a stream of IRQ9: nobody
> > > cared messages (fasteoi acpi, irqpoll = nogo) while doing so.
> >
> > "medicated snail mode". Lol.
>
> It turns out, that this is caused by console=ttyS0,115200n8. Without
> the problematic driver found by pm_trace for the old Pinacle SAT card...
>
> 02:02.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)
> Subsystem: Pinnacle Systems Inc. PCTV Sat (DBC receiver)
> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
> Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
> Latency: 32 (4000ns min, 10000ns max)
> Interrupt: pin A routed to IRQ 17
> Region 0: Memory at f2100000 (32-bit, prefetchable) [size=4K]
> Capabilities: [44] Vital Product Data
> Capabilities: [4c] 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-
>
> went boom here -->02:02.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)
> Subsystem: Pinnacle Systems Inc. PCTV Sat (DBC receiver)
> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
> Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
> Latency: 32 (1000ns min, 63750ns max)
> Interrupt: pin A routed to IRQ 17
> Region 0: Memory at f2101000 (32-bit, prefetchable) [size=4K]
> Capabilities: [44] Vital Product Data
> Capabilities: [4c] 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-
>
> 02:03.0 Multimedia controller: Philips Semiconductors SAA7134 Video Broadcast Decoder (rev 01)
> Subsystem: Creatix Polymedia GmbH Medion 7134
> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
> Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
> Latency: 32 (2000ns min, 8000ns max)
> Interrupt: pin A routed to IRQ 20
> Region 0: Memory at f2002000 (32-bit, non-prefetchable) [size=1K]
> Capabilities: [40] Power Management version 1
> Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
> Status: D0 PME-Enable- DSel=0 DScale=1 PME-
>
> ...and the serial console, I can now suspend to ram just fine with stock
> 2.6.19-rc6. As a serial port test, I set up a getty on ttyS0, and
> logged in via minicom prior to suspend. After resume, the serial port
> isn't talking. Kill -9 the shell though, and all is fine again.

Hm, could you please file a bugzilla report regarding the serial console for
the information of its maintainer(s)?

Greetings,
Rafael

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