OS: openSUSE 11.2, KDE desktop, fully patched.
During the kernel boot the backlight dims; once fully booted I cannot control the backlight with the function keys. The dimmed backlight presents a usability problem if you eyesight is not that great. OpenSUSE 10.3 effectively inherited whatever the BIOS left; i.e. mains-powered then backlight full-on, battery powered backlight dimmed; I could not control the backlight with 10.3. For 11.2 I captured the following through the “dmesg”.
7.008632] sky2 0000:02:00.0: Yukon-2 EC Ultra chip revision 3
7.009475] alloc irq_desc for 28 on node 0
7.009479] alloc kstat_irqs on node 0
7.009611] sky2 0000:02:00.0: irq 28 for MSI/MSI-X
7.011093] sky2 eth0: addr 00:13:77:69:43:a8
7.011137] i801_smbus 0000:00:1f.3: PCI INT C -> GSI 19 (level, low) -> IRQ 19
7.011144] ACPI: I/O resource 0000:00:1f.3 [0x1c00-0x1c1f] conflicts with ACPI region SMBI [0x1c00-0x1c0f]
7.011771] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
7.016111] ACPI: Battery Slot [BAT1] (battery present)
7.016245] input: Lid Switch as /devices/LNXSYSTM:00/device:00/PNP0C0D:00/input/input5
7.023162] ACPI: Lid Switch [LID0]
7.054806] Linux video capture interface: v2.00
The backlight always dims at the point that the line relating to the I/O resource conflict is printed during the boot. For completeness the dump of PCI devices for the R700 is as follows:
00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile PM965/GM965/GL960 PCI Express Root Port (rev 03)
00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 3 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3)
00:1f.0 ISA bridge: Intel Corporation 82801HEM (ICH8M) LPC Interface Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA IDE Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 03)
01:00.0 VGA compatible controller: nVidia Corporation G86 [GeForce 8400M GS] (rev a1)
02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8055 PCI-E Gigabit Ethernet Controller (rev 13)
04:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)
I can use the kernel parameter “acpi=off” to resolve the conflict and keep the backlight on full, but then I lose all battery monitoring and the machine will not power-down cleanly.
Has anybody come across a similar problem and come up with a solution?
Thanks in advance.