Regression - C640 Brightness cannot be changed while X is active

[bubba_169]

There seems to be no way at all to change the laptop screens brightness while X is running on the screen. Both the function keys and the gnome brightness applet fail to do their job. All worked perfectly pre-intrepid. I have a feeling the regression in intrepid is down to the latest auto-detection in Xorg.

A workaround I have found is if I switch away from X with ctrl+alt+F1 then I can change the brightness with the hotkeys and then return to X with ctrl+alt+F7. Not the most efficient way but might give you a clue about whats happening. It seems my LCD is not configured properly within intrepid too as the file in /proc/acpi/video/VID/LCD/info shows the monitor as UNKNOWN and also claims it's unknown to the bios. Blacklisting the video module doesnt cure anything though.

If any more information is required just ask and I will try my best to provide...

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation 82845 845 [Brookdale] Chipset Host Bridge [8086:1a30] (rev 04) 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 Region 0: Memory at e8000000 (32-bit, prefetchable) [size=64M] Capabilities: <access denied> Kernel driver in use: agpgart-intel Kernel modules: intel-agp 00:01.0 PCI bridge [0604]: Intel Corporation 82845 845 [Brookdale] Chipset AGP Bridge [8086:1a31] (rev 04) 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: 32 Bus: primary=00, secondary=01, subordinate=01, sec-latency=32 I/O behind bridge: 0000c000-0000cfff Memory behind bridge: fc000000-fdffffff Prefetchable memory behind bridge: e0000000-e7ffffff Secondary status: 66MHz+ FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA+ VGA+ MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Kernel modules: shpchp 00:1d.0 USB Controller [0c03]: Intel Corporation 82801CA/CAM USB Controller #1 [8086:2482] (rev 02) Subsystem: Intel Corporation Device [8086:4541] 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: 0 Interrupt: pin A routed to IRQ 11 Region 4: I/O ports at bf80 [size=32] Kernel driver in use: uhci_hcd Kernel modules: uhci-hcd 00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev 42) 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 Bus: primary=00, secondary=02, subordinate=10, sec-latency=32 I/O behind bridge: 0000e000-0000ffff Memory behind bridge: f4000000-fbffffff Prefetchable memory behind bridge: 30000000-39ffffff Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Kernel modules: shpchp 00:1f.0 ISA bridge [0601]: Intel Corporation 82801CAM ISA Bridge (LPC) [8086:248c] (rev 02) 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: 0 Kernel modules: iTCO_wdt, intel-rng 00:1f.1 IDE interface [0101]: Intel Corporation 82801CAM IDE U100 Controller [8086:248a] (rev 02) (prog-if 8a [Master SecP PriP]) Subsystem: Intel Corporation Device [8086:4541] 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: 0 Interrupt: pin A routed to IRQ 11 Region 0: I/O ports at 01f0 [size=8] Region 1: I/O ports at 03f4 [size=1] Region 2: I/O ports at 0170 [size=8] Region 3: I/O ports at 0374 [size=1] Region 4: I/O ports at bfa0 [size=16] Region 5: Memory at 3a000000 (32-bit, non-prefetchable) [size=1K] Kernel driver in use: ata_piix Kernel modules: ata_piix 00:1f.5 Multimedia audio controller [0401]: Intel Corporation 82801CA/CAM AC'97 Audio Controller [8086:2485] (rev 02) Subsystem: Cirrus Logic Device [1013:5959] 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: 0 Interrupt: pin B routed to IRQ 5 Region 0: I/O ports at d800 [size=256] Region 1: I/O ports at dc80 [size=64] Kernel driver in use: Intel ICH Kernel modules: snd-intel8x0 00:1f.6 Modem [0703]: Intel Corporation 82801CA/CAM AC'97 Modem Controller [8086:2486] (rev 02) Subsystem: PCTel Inc Device [134d:4c21] 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- Interrupt: pin B routed to IRQ 5 Region 0: I/O ports at d400 [size=256] Region 1: I/O ports at dc00 [size=128] Kernel modules: snd-intel8x0m 01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon Mobility M7 LW [Radeon Mobility 7500] [1002:4c57] Subsystem: Dell Device [1028:012a] 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: 32 (2000ns min), Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 11 Region 0: Memory at e0000000 (32-bit, prefetchable) [size=128M] Region 1: I/O ports at c000 [size=256] Region 2: Memory at fcff0000 (32-bit, non-prefetchable) [size=64K] [virtual] Expansion ROM at fc000000 [disabled] [size=128K] Capabilities: <access denied> Kernel modules: radeonfb 02:00.0 Ethernet controller [0200]: 3Com Corporation 3c905C-TX/TX-M [Tornado] [10b7:9200] (rev 78) Subsystem: Dell Device [1028:012a] 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: 32 (2500ns min, 2500ns max), Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 11 Region 0: I/O ports at ec80 [size=128] Region 1: Memory at f8fffc00 (32-bit, non-prefetchable) [size=128] Expansion ROM at 38000000 [disabled] [size=128K] Capabilities: <access denied> Kernel driver in use: 3c59x Kernel modules: 3c59x 02:01.0 CardBus bridge [0607]: Texas Instruments PCI1420 PC card Cardbus Controller [104c:ac51] Subsystem: Dell Device [1028:012a] 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: 168, Cache Line Size: 128 bytes Interrupt: pin A routed to IRQ 11 Region 0: Memory at f8000000 (32-bit, non-prefetchable) [size=4K] Bus: primary=02, secondary=03, subordinate=06, sec-latency=176 Memory window 0: 30000000-33fff000 (prefetchable) Memory window 1: f4000000-f7fff000 I/O window 0: 0000e000-0000e0ff I/O window 1: 0000e400-0000e4ff BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset+ 16bInt+ PostWrite+ 16-bit legacy interface ports at 0001 Kernel driver in use: yenta_cardbus Kernel modules: yenta_socket 02:01.1 CardBus bridge [0607]: Texas Instruments PCI1420 PC card Cardbus Controller [104c:ac51] Subsystem: Dell Device [1028:012a] 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: 168, Cache Line Size: 128 bytes Interrupt: pin A routed to IRQ 11 Region 0: Memory at f8001000 (32-bit, non-prefetchable) [size=4K] Bus: primary=02, secondary=07, subordinate=0a, sec-latency=176 Memory window 0: 34000000-37fff000 (prefetchable) Memory window 1: 3c000000-3ffff000 I/O window 0: 0000e800-0000e8ff I/O window 1: 0000f000-0000f0ff BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset+ 16bInt+ PostWrite+ 16-bit legacy interface ports at 0001 Kernel driver in use: yenta_cardbus Kernel modules: yenta_socket 02:03.0 Network controller [0280]: Intel Corporation PRO/Wireless 2200BG [Calexico2] Network Connection [8086:4220] (rev 05) Subsystem: Intel Corporation Device [8086:2702] 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: 32 (750ns min, 6000ns max), Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 5 Region 0: Memory at f8ffe000 (32-bit, non-prefetchable) [size=4K] Capabilities: <access denied> Kernel driver in use: ipw2200 Kernel modules: ipw2200

[Ian Weisser (ian-weisser)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately we can't fix it without more information.

Please include the information requested at https://help.ubuntu.com/community/DebuggingXAutoconfiguration as separate attachments.

[bubba_169 (simonsos)]

Discovery complained about not finding Bus but I got the others. I replaced <driver> with 'radeon' for xresprobe.

[Bryce Harrington (bryce)]

[This is an automatic notification.]

Hi bubba_169,

This bug was reported against an earlier version of Ubuntu, can you
test if it still occurs on Lucid?

Please note we also provide technical support for older versions of
Ubuntu, but not in the bug tracker. Instead, to raise the issue through
normal support channels, please see:

    http://www.ubuntu.com/support

If you are the original reporter and can still reproduce the issue on
Lucid, please run the following command to refresh the report:

  apport-collect 283364

If you are not the original reporter, please file a new bug report, so
we can work with you as the original reporter instead (you can reference
bug 283364 in your report if you think it may be related):

  ubuntu-bug xorg

If by chance you can no longer reproduce the issue on Lucid or if you
feel it is no longer relevant, please mark the bug report 'Fix Released'
or 'Invalid' as appropriate, at the following URL:

  https://bugs.launchpad.net/ubuntu/+bug/283364

[bubba_169 (simonsos)]

Sorry but I don't own this particular laptop any more so I can't test it. Please mark this bug as you see fit as I cannot say myself if it is invalid or fixed.

[Launchpad Janitor (janitor)]

[Expired for xorg-server (Ubuntu) because there has been no activity for 60 days.]