[2.6.0-test*] Timer interrupts not fired at all? (With a remark to Framebuffers)

From: Thunder Anklin (thunder_at_keepsake.ch)
Date: 10/31/03

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Date:	Fri, 31 Oct 2003 14:10:19 +0100
To: linux-kernel@vger.kernel.org

Salut,

I happened to notice that under Linux 2.6.0-test[1-9] timer interrupts
appear not to be fired at all unless another interrupt happens. This
has been shown by some weird behaviors:

1. sleeps on boot can take an infinite amount of time, but if I press
any key, the booting will continue at once.

2. If I call date on a console when the PC is idle, each call to date
will show exactly one second more, even if I waited ten seconds.

3. When I do something like playing ogg streams, the clock runs at its
usual rate.

I didn't see any of these problems on Linux 2.4 or FreeBSD 4.8, but
FreeBSD 5.* behaves in a strange way, too: the clock will run at
double speed.

(Another probably bad thing: The NVidia framebuffer driver doesn't
appear to work well for me: if I switch to more than 800x600@85, the
monitor switches itself off. Note, however, that 2.4 is working well
at 1024x768@100.)

thunder@dbintra:/tmp$ sudo lspci -vvv
Password:
00:00.0 Host bridge: ALi Corporation M1541 (rev 04)
        Subsystem: ALi Corporation ALI M1541 Aladdin V/V+ AGP System Controller
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
        Latency: 64
        Region 0: Memory at e2000000 (32-bit, non-prefetchable) [size=32M]
        Capabilities: [b0] AGP version 1.0
                Status: RQ=29 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2
                Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW- Rate=<none>

00:01.0 PCI bridge: ALi Corporation M1541 PCI to AGP Controller (rev 04) (prog-if 00 [Normal decode])
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 64
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=64
        I/O behind bridge: 0000e000-0000dfff
        Memory behind bridge: e1000000-e1ffffff
        Prefetchable memory behind bridge: e5f00000-e7ffffff
        BridgeCtl: Parity- SERR- NoISA- VGA+ MAbort- >Reset- FastB2B-

00:02.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03) (prog-if 10 [OHCI])
        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: 64 (20000ns max)
        Interrupt: pin A routed to IRQ 9
        Region 0: Memory at e0800000 (32-bit, non-prefetchable) [size=4K]

00:03.0 Bridge: ALi Corporation M7101 PMU
        Subsystem: ALi Corporation ALI M7101 Power Management Controller
        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-

00:06.0 Multimedia audio controller: ESS Technology ES1969 Solo-1 Audiodrive (rev 01)
        Subsystem: ESS Technology Solo-1 Audio Adapter
        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 (500ns min, 6000ns max)
        Interrupt: pin A routed to IRQ 5
        Region 0: I/O ports at d800 [size=64]
        Region 1: I/O ports at d400 [size=16]
        Region 2: I/O ports at d000 [size=16]
        Region 3: I/O ports at b800 [size=4]
        Region 4: I/O ports at b400 [size=4]
        Capabilities: [c0] Power Management version 1
                Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.0 ISA bridge: ALi Corporation M1533 PCI to ISA Bridge [Aladdin IV] (rev c3)
        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: 0

00:09.0 SCSI storage controller: Tekram Technology Co.,Ltd. TRM-S1040 (rev 01)
        Subsystem: Tekram Technology Co.,Ltd. TRM-S1040
        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, cache line size 08
        Interrupt: pin A routed to IRQ 12
        Region 0: I/O ports at b000 [size=256]
        Region 1: Memory at e0000000 (32-bit, non-prefetchable) [size=4K]
        Expansion ROM at <unassigned> [disabled] [size=64K]
        Capabilities: [dc] Power Management version 1
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
        Subsystem: Realtek Semiconductor Co., Ltd. RT8139
        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 (8000ns min, 16000ns max)
        Interrupt: pin A routed to IRQ 5
        Region 0: I/O ports at a800 [size=256]
        Region 1: Memory at df800000 (32-bit, non-prefetchable) [size=256]
        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-

00:0b.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 04)
        Subsystem: Creative Labs CT4850 SBLive! Value
        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 (500ns min, 5000ns max)
        Interrupt: pin A routed to IRQ 10
        Region 0: I/O ports at a400 [size=32]
        Capabilities: [dc] Power Management version 1
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0b.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 01)
        Subsystem: Creative Labs Gameport Joystick
        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
        Region 0: I/O ports at a000 [size=8]
        Capabilities: [dc] Power Management version 1
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0d.0 Network controller: AVM Audiovisuelles MKTG & Computer System GmbH A1 ISDN [Fritz] (rev 02)
        Subsystem: AVM Audiovisuelles MKTG & Computer System GmbH FRITZ!Card ISDN Controller
        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-
        Interrupt: pin A routed to IRQ 12
        Region 0: Memory at df000000 (32-bit, non-prefetchable) [size=32]
        Region 1: I/O ports at 9800 [size=32]

00:0f.0 IDE interface: ALi Corporation M5229 IDE (rev c1) (prog-if 8a [Master SecP PriP])
        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 (500ns min, 1000ns max)
        Interrupt: pin A routed to IRQ 0
        Region 4: I/O ports at 9400 [size=16]

01:00.0 VGA compatible controller: nVidia Corporation NV5M64 [RIVA TNT2 Model 64/Model 64 Pro] (rev 15) (prog-if 00 [VGA])
        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: 64 (1250ns min, 250ns max)
        Interrupt: pin A routed to IRQ 11
        Region 0: Memory at e1000000 (32-bit, non-prefetchable) [size=16M]
        Region 1: Memory at e6000000 (32-bit, prefetchable) [size=32M]
        Expansion ROM at e5ff0000 [disabled] [size=64K]
        Capabilities: [60] Power Management version 1
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [44] AGP version 2.0
                Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA- ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2,x4
                Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW- Rate=<none>

thunder@dbintra:/tmp$

Thunder

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