I have a HP Envy 14 laptop, which has switchable graphics between: 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Madison [Radeon HD 5000M Series] (rev ff)
This used to work (I'm not using it very often, so I don't know which kernel version broke it), and I think it caused total kernel hang in 3.0 till 3.3 or so. Not it "works" in the sense that when a HDMI cable is connected, I get a picture on the connected monitor. But the primary display output, LVDS-2, stays black. Here's the relevant dmesg parts: agpgart-intel 0000:00:00.0: Intel HD Graphics Chipset agpgart-intel 0000:00:00.0: detected gtt size: 2097152K total, 262144K mappable agpgart-intel 0000:00:00.0: detected 32768K stolen memory agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xb0000000 [drm] Initialized drm 1.1.0 20060810 i915 0000:00:02.0: setting latency timer to 64 i915 0000:00:02.0: irq 40 for MSI/MSI-X [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [drm] Driver supports precise vblank timestamp query. vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=none:owns=io+mem vgaarb: transferring owner from PCI:0000:00:02.0 to PCI:0000:01:00.0 ACPI: Deprecated procfs I/F for battery is loaded, please retry with CONFIG_ACPI_PROCFS_POWER cleared ACPI: Battery Slot [BAT0] (battery present) ACPI: Deprecated procfs I/F for battery is loaded, please retry with CONFIG_ACPI_PROCFS_POWER cleared ACPI: Battery Slot [BAT1] (battery absent) [drm] GMBUS [i915 gmbus vga] timed out, falling back to bit banging on pin 2 fbcon: inteldrmfb (fb0) is primary device Console: switching to colour frame buffer device 200x56 i915 0000:00:02.0: fb0: inteldrmfb frame buffer device i915 0000:00:02.0: registered panic notifier [Firmware Bug]: ACPI: No _BQC method, cannot determine initial brightness acpi device:01: registered as cooling_device5 ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input3 [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS acpi device:0a: registered as cooling_device6 ACPI: Video Device [PEGP] (multi-head: yes rom: no post: no) input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:08/LNXVIDEO:01/input/input4 [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 [drm] radeon defaulting to kernel modesetting. [drm] radeon kernel modesetting enabled. VGA switcheroo: detected switching method \_SB_.PCI0.GFX0.ATPX handle radeon 0000:01:00.0: enabling device (0000 -> 0003) [drm] initializing kernel modesetting (REDWOOD 0x1002:0x68C1 0x103C:0x1436). [drm] register mmio base: 0xC4400000 [drm] register mmio size: 131072 vga_switcheroo: enabled ATPX version 1 ATOM BIOS: MADISON radeon 0000:01:00.0: VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used) radeon 0000:01:00.0: GTT: 512M 0x0000000040000000 - 0x000000005FFFFFFF mtrr: no more MTRRs available [drm] Detected VRAM RAM=1024M, BAR=256M [drm] RAM width 128bits DDR [TTM] Zone kernel: Available graphics memory: 3980934 kiB [TTM] Zone dma32: Available graphics memory: 2097152 kiB [TTM] Initializing pool allocator [TTM] Initializing DMA pool allocator [drm] radeon: 1024M of VRAM memory ready [drm] radeon: 512M of GTT memory ready. [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [drm] Driver supports precise vblank timestamp query. radeon 0000:01:00.0: irq 45 for MSI/MSI-X radeon 0000:01:00.0: radeon: using MSI. [drm] radeon: irq initialized. [drm] GART: num cpu pages 131072, num gpu pages 131072 [drm] probing gen 2 caps for device 8086:45 = 1/0 [drm] Loading REDWOOD Microcode [drm] PCIE GART of 512M enabled (table at 0x0000000000040000). radeon 0000:01:00.0: WB enabled radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff880251324c00 radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff880251324c0c radeon 0000:01:00.0: enabling bus mastering [drm] ring test on 0 succeeded in 1 usecs [drm] ring test on 3 succeeded in 1 usecs [drm] ib test on ring 0 succeeded in 0 usecs [drm] ib test on ring 3 succeeded in 0 usecs [drm] radeon atom DIG backlight initialized [drm] Radeon Display Connectors [drm] Connector 0: [drm] LVDS-2 [drm] DDC: 0x6560 0x6560 0x6564 0x6564 0x6568 0x6568 0x656c 0x656c [drm] Encoders: [drm] LCD1: INTERNAL_UNIPHY [drm] Connector 1: [drm] DP-1 [drm] HPD2 [drm] DDC: 0x6440 0x6440 0x6444 0x6444 0x6448 0x6448 0x644c 0x644c [drm] Encoders: [drm] DFP1: INTERNAL_UNIPHY1 [drm] Connector 2: [drm] HDMI-A-1 [drm] HPD1 [drm] DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c [drm] Encoders: [drm] DFP2: INTERNAL_UNIPHY1 [drm] Internal thermal controller with fan control [drm] radeon: power management initialized [drm] fb mappable at 0xA0142000 [drm] vram apper at 0xA0000000 [drm] size 5787648 [drm] fb depth is 24 [drm] pitch is 6400 radeon 0000:01:00.0: fb1: radeondrmfb frame buffer device [drm] Initialized radeon 2.29.0 20080528 for 0000:01:00.0 on minor 1 When I start the intel framebuffer, the display is also black, but I found out that that is just the brightness set to 0, so I wrote a little too that writes to /sys/class/backlight/acpi_video0/brightness to set a sensible brightness. When the radeon screen stayed black, I assumed the same problem, so I changed my tool to also write to /sys/class/backlight/acpi_video1/brightness, but this does not help. Do you have any suggestion on how to fix this? Felix -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
