Hi lkml,
I'm using the kernel 3.2-rc1 and I'm getting the following message in my dmesg: fixme: max PWM is zero.
I don't remember if this message was here before...
I'm trying to verify what is causing this. I found this waring message in the drivers/gpu/drm/i915/intel_panel.c.
There is a comment above this message, talking about put a code to query mode clock or hw clock to set the max PWM.
Bellow is my lspci.
I will be happy if you continue to cc me, and if you need any test, I'm able to do this.
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 09) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, fast devsel, latency 0 Capabilities: [e0] Vendor Specific Information: Len=0a <?> Kernel driver in use: agpgart-intel Kernel modules: intel-agp
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, fast devsel, latency 0, IRQ 44 Memory at f8000000 (64-bit, non-prefetchable) [size=4M] Memory at d0000000 (64-bit, prefetchable) [size=256M] I/O ports at 1800 [size=8] Expansion ROM at <unassigned> [disabled] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 3 Kernel driver in use: i915 Kernel modules: i915
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 09) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, fast devsel, latency 0 Memory at f8400000 (64-bit, non-prefetchable) [size=1M] Capabilities: [d0] Power Management version 3
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 16 I/O ports at 1820 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 21 I/O ports at 1840 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 19 I/O ports at 1860 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03) (prog-if 20 [EHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 19 Memory at f8704000 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port: BAR=1 offset=00a0 Capabilities: [98] PCI Advanced Features Kernel driver in use: ehci_hcd
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, fast devsel, latency 0, IRQ 43 Memory at f8700000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel Capabilities: [130] Root Complex Link Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=02, subordinate=03, sec-latency=0 I/O behind bridge: 00002000-00002fff Memory behind bridge: f4000000-f5ffffff Prefetchable memory behind bridge: 00000000f0000000-00000000f1ffffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Gammagraphx, Inc. (or missing ID) Device 0000 Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel Capabilities: [180] Root Complex Link Kernel driver in use: pcieport Kernel modules: shpchp
00:1c.5 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=04, subordinate=05, sec-latency=0 I/O behind bridge: 00003000-00003fff Memory behind bridge: f6000000-f7ffffff Prefetchable memory behind bridge: 00000000f2000000-00000000f3ffffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Gammagraphx, Inc. (or missing ID) Device 0000 Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel Capabilities: [180] Root Complex Link Kernel driver in use: pcieport Kernel modules: shpchp
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 23 I/O ports at 1880 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 19 I/O ports at 18a0 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 18 I/O ports at 18c0 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03) (prog-if 20 [EHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 23 Memory at f8704400 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port: BAR=1 offset=00a0 Capabilities: [98] PCI Advanced Features Kernel driver in use: ehci_hcd
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93) (prog-if 01 [Subtractive decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=06, subordinate=06, sec-latency=0 Capabilities: [50] Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0 Capabilities: [e0] Vendor Specific Information: Len=0c <?> Kernel modules: iTCO_wdt
00:1f.2 IDE interface: Intel Corporation ICH9M/M-E 2 port SATA IDE Controller (rev 03) (prog-if 8f [Master SecP SecO PriP PriO]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19 I/O ports at 18f8 [size=8] I/O ports at 180c [size=4] I/O ports at 18f0 [size=8] I/O ports at 1808 [size=4] I/O ports at 18e0 [size=16] I/O ports at 1810 [size=16] Capabilities: [70] Power Management version 3 Capabilities: [b0] PCI Advanced Features Kernel driver in use: ata_piix
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: medium devsel, IRQ 19 Memory at c0000000 (64-bit, non-prefetchable) [size=256] I/O ports at 1c00 [size=32] Kernel driver in use: i801_smbus Kernel modules: i2c-i801
00:1f.5 IDE interface: Intel Corporation ICH9M/M-E 2 port SATA IDE Controller (rev 03) (prog-if 85 [Master SecO PriO]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19 I/O ports at 1c50 [size=8] I/O ports at 1c44 [size=4] I/O ports at 1c48 [size=8] I/O ports at 1c40 [size=4] I/O ports at 1c30 [size=16] I/O ports at 1c20 [size=16] Capabilities: [70] Power Management version 3 Capabilities: [b0] PCI Advanced Features Kernel driver in use: ata_piix
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, fast devsel, latency 0, IRQ 42 I/O ports at 3000 [size=256] Memory at f6000000 (64-bit, non-prefetchable) [size=4K] Memory at f2000000 (64-bit, prefetchable) [size=64K] [virtual] Expansion ROM at f2020000 [disabled] [size=128K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Endpoint, MSI 01 Capabilities: [b0] MSI-X: Enable- Count=2 Masked- Capabilities: [d0] Vital Product Data Capabilities: [100] Advanced Error Reporting Capabilities: [140] Virtual Channel Capabilities: [160] Device Serial Number 71-00-00-00-68-4c-e0-00 Kernel driver in use: r8169 Kernel modules: r8169
* Uma vida sem desafios é uma vida sem razão * * A life without challanges is a non reason life *
So, anybody gets the same message?
I'm trying the 3.2-rc2 and it gives the same message.
Again, if you need someone to make tests, or test some patches, I'm able to do this.
* Uma vida sem desafios é uma vida sem razão * * A life without challanges is a non reason life *
On Tue, 15 Nov 2011, Marcos Paulo de Souza wrote:
Hi lkml,
I'm using the kernel 3.2-rc1 and I'm getting the following message in my dmesg: fixme: max PWM is zero.
I don't remember if this message was here before...
I'm trying to verify what is causing this. I found this waring message in the drivers/gpu/drm/i915/intel_panel.c.
There is a comment above this message, talking about put a code to query mode clock or hw clock to set the max PWM.
Bellow is my lspci.
I will be happy if you continue to cc me, and if you need any test, I'm able to do this.
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 09) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, fast devsel, latency 0 Capabilities: [e0] Vendor Specific Information: Len=0a <?> Kernel driver in use: agpgart-intel Kernel modules: intel-agp
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, fast devsel, latency 0, IRQ 44 Memory at f8000000 (64-bit, non-prefetchable) [size=4M] Memory at d0000000 (64-bit, prefetchable) [size=256M] I/O ports at 1800 [size=8] Expansion ROM at <unassigned> [disabled] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 3 Kernel driver in use: i915 Kernel modules: i915
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 09) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, fast devsel, latency 0 Memory at f8400000 (64-bit, non-prefetchable) [size=1M] Capabilities: [d0] Power Management version 3
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 16 I/O ports at 1820 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 21 I/O ports at 1840 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 19 I/O ports at 1860 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03) (prog-if 20 [EHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 19 Memory at f8704000 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port: BAR=1 offset=00a0 Capabilities: [98] PCI Advanced Features Kernel driver in use: ehci_hcd
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, fast devsel, latency 0, IRQ 43 Memory at f8700000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel Capabilities: [130] Root Complex Link Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=02, subordinate=03, sec-latency=0 I/O behind bridge: 00002000-00002fff Memory behind bridge: f4000000-f5ffffff Prefetchable memory behind bridge: 00000000f0000000-00000000f1ffffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Gammagraphx, Inc. (or missing ID) Device 0000 Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel Capabilities: [180] Root Complex Link Kernel driver in use: pcieport Kernel modules: shpchp
00:1c.5 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=04, subordinate=05, sec-latency=0 I/O behind bridge: 00003000-00003fff Memory behind bridge: f6000000-f7ffffff Prefetchable memory behind bridge: 00000000f2000000-00000000f3ffffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Gammagraphx, Inc. (or missing ID) Device 0000 Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel Capabilities: [180] Root Complex Link Kernel driver in use: pcieport Kernel modules: shpchp
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 23 I/O ports at 1880 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 19 I/O ports at 18a0 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03) (prog-if 00 [UHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 18 I/O ports at 18c0 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03) (prog-if 20 [EHCI]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0, IRQ 23 Memory at f8704400 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port: BAR=1 offset=00a0 Capabilities: [98] PCI Advanced Features Kernel driver in use: ehci_hcd
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93) (prog-if 01 [Subtractive decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=06, subordinate=06, sec-latency=0 Capabilities: [50] Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, medium devsel, latency 0 Capabilities: [e0] Vendor Specific Information: Len=0c <?> Kernel modules: iTCO_wdt
00:1f.2 IDE interface: Intel Corporation ICH9M/M-E 2 port SATA IDE Controller (rev 03) (prog-if 8f [Master SecP SecO PriP PriO]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19 I/O ports at 18f8 [size=8] I/O ports at 180c [size=4] I/O ports at 18f0 [size=8] I/O ports at 1808 [size=4] I/O ports at 18e0 [size=16] I/O ports at 1810 [size=16] Capabilities: [70] Power Management version 3 Capabilities: [b0] PCI Advanced Features Kernel driver in use: ata_piix
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: medium devsel, IRQ 19 Memory at c0000000 (64-bit, non-prefetchable) [size=256] I/O ports at 1c00 [size=32] Kernel driver in use: i801_smbus Kernel modules: i2c-i801
00:1f.5 IDE interface: Intel Corporation ICH9M/M-E 2 port SATA IDE Controller (rev 03) (prog-if 85 [Master SecO PriO]) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19 I/O ports at 1c50 [size=8] I/O ports at 1c44 [size=4] I/O ports at 1c48 [size=8] I/O ports at 1c40 [size=4] I/O ports at 1c30 [size=16] I/O ports at 1c20 [size=16] Capabilities: [70] Power Management version 3 Capabilities: [b0] PCI Advanced Features Kernel driver in use: ata_piix
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02) Subsystem: FIRST INTERNATIONAL Computer Inc Device 3009 Flags: bus master, fast devsel, latency 0, IRQ 42 I/O ports at 3000 [size=256] Memory at f6000000 (64-bit, non-prefetchable) [size=4K] Memory at f2000000 (64-bit, prefetchable) [size=64K] [virtual] Expansion ROM at f2020000 [disabled] [size=128K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Endpoint, MSI 01 Capabilities: [b0] MSI-X: Enable- Count=2 Masked- Capabilities: [d0] Vital Product Data Capabilities: [100] Advanced Error Reporting Capabilities: [140] Virtual Channel Capabilities: [160] Device Serial Number 71-00-00-00-68-4c-e0-00 Kernel driver in use: r8169 Kernel modules: r8169
- Uma vida sem desafios é uma vida sem razão *
- A life without challanges is a non reason life *
On Sat, 19 Nov 2011 11:26:07 +0000 (Local time zone must be set--see zic manual page), Marcos Paulo de Souza marcos.mage@gmail.com wrote:
So, anybody gets the same message?
I'm trying the 3.2-rc2 and it gives the same message.
Again, if you need someone to make tests, or test some patches, I'm able to do this.
Is your machine even using the intel backlight device? You can test this by:
# cd /sys/class/backlight/intel_backlight
Then look at 'max_brightness' and try echoing a range of numbers from 0 to max_brightness into the brightness file and see if it changes the backlight.
It's more than possible that your machine is simply using some other hardware to drive the backlight and that the integrated backlight controller is simply disabled.
Hi Keith,
On Sat, 19 Nov 2011, Keith Packard wrote:
On Sat, 19 Nov 2011 11:26:07 +0000 (Local time zone must be set--see zic manual page), Marcos Paulo de Souza marcos.mage@gmail.com wrote:
So, anybody gets the same message?
I'm trying the 3.2-rc2 and it gives the same message.
Again, if you need someone to make tests, or test some patches, I'm able to do this.
Is your machine even using the intel backlight device? You can test this by:
# cd /sys/class/backlight/intel_backlight
Then look at 'max_brightness' and try echoing a range of numbers from 0 to max_brightness into the brightness file and see if it changes the backlight.
My max_brightness is 1, and my brightness is 0. But, my acpi_video0 have a max_brightness value = 9...
It's more than possible that your machine is simply using some other hardware to drive the backlight and that the integrated backlight controller is simply disabled.
So, what can I do to silence this warning...? Change the driver of backlight?
-- keith.packard@intel.com
On Mon, 21 Nov 2011 22:48:21 +0000 (Local time zone must be set--see zic manual page), Marcos Paulo de Souza marcos.mage@gmail.com wrote:
My max_brightness is 1, and my brightness is 0.
Right, we've prevented the internal backlight driver from exposing a max value of 0 as that's just confusing.
But, my acpi_video0 have a max_brightness value = 9...
Right, sounds like your device is just using some other backlight controller, which is perfectly reasonable.
So, what can I do to silence this warning...? Change the driver of backlight?
If your backlight keys work correctly, then things are fine and perhaps we should just remove the warning from the driver, or disable the internal driver when we discover this situation.
This is the first time I've heard of this warning appearing...
On Mon, Nov 21, 2011 at 23:40, Keith Packard keithp@keithp.com wrote:
On Mon, 21 Nov 2011 22:48:21 +0000 (Local time zone must be set--see zic manual page), Marcos Paulo de Souza marcos.mage@gmail.com wrote:
My max_brightness is 1, and my brightness is 0.
Right, we've prevented the internal backlight driver from exposing a max value of 0 as that's just confusing.
But, my acpi_video0 have a max_brightness value = 9...
Right, sounds like your device is just using some other backlight controller, which is perfectly reasonable.
So, what can I do to silence this warning...? Change the driver of backlight?
If your backlight keys work correctly, then things are fine and perhaps we should just remove the warning from the driver, or disable the internal driver when we discover this situation.
This is the first time I've heard of this warning appearing...
It appears here as well. I think it was since 2.6.39 or 3.0, I'm not sure.
Same card:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller]) Subsystem: Dell Device 02bb Flags: bus master, fast devsel, latency 0, IRQ 45 Memory at f6400000 (64-bit, non-prefetchable) [size=4M] Memory at d0000000 (64-bit, prefetchable) [size=256M] I/O ports at 1800 [size=8] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 3 Kernel driver in use: i915
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) Subsystem: Dell Device 02bb Flags: bus master, fast devsel, latency 0 Memory at f6100000 (64-bit, non-prefetchable) [size=1M] Capabilities: [d0] Power Management version 3
My kernel log has:
[drm] Driver supports precise vblank timestamp query. composite sync not supported fixme: max PWM is zero. composite sync not supported
Is this "composite sync not supported" related to this issue?
Lucas De Marchi
dri-devel@lists.freedesktop.org