Hi, I'm experiencing a longer boot up with recent kernels. Looking at the kernel log, it seems to be related to the i915 driver. See excerpts of the logs below: 2.6.38.4: [ 0.533344] Linux agpgart interface v0.103 [ 0.533411] agpgart-intel 0000:00:00.0: Intel GM45 Chipset [ 0.533597] agpgart-intel 0000:00:00.0: detected gtt size: 2097152K total, 26 2144K mappable [ 0.534839] agpgart-intel 0000:00:00.0: detected 32768K stolen memory [ 0.534957] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xd0000000 [ 0.535023] [drm] Initialized drm 1.1.0 20060810 [ 0.535045] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 0.535050] i915 0000:00:02.0: setting latency timer to 64 [ 0.625997] i915 0000:00:02.0: irq 45 for MSI/MSI-X [ 0.626013] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [ 0.626015] [drm] Driver supports precise vblank timestamp query. [ 0.704773] composite sync not supported [ 0.706220] fixme: max PWM is zero. [ 0.714167] composite sync not supported [ 0.728223] fbcon: inteldrmfb (fb0) is primary device [ 0.732710] Console: switching to colour frame buffer device 160x50 [ 0.735365] fb0: inteldrmfb frame buffer device [ 0.735366] drm: registered panic notifier [ 0.755610] acpi device:06: registered as cooling_device0 [ 0.755786] input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:01/input/input4 [ 0.755792] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) [ 0.755888] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 ---------- And for 3.2-rc1 (though 3.1 and 3.0 have similar timings): [ 0.611279] Linux agpgart interface v0.103 [ 0.611346] agpgart-intel 0000:00:00.0: Intel GM45 Chipset [ 0.611541] agpgart-intel 0000:00:00.0: detected gtt size: 2097152K total, 26 2144K mappable [ 0.612758] agpgart-intel 0000:00:00.0: detected 32768K stolen memory [ 0.612890] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xd0000000 [ 0.612938] [drm] Initialized drm 1.1.0 20060810 [ 0.612958] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 0.612963] i915 0000:00:02.0: setting latency timer to 64 [ 0.705279] i915 0000:00:02.0: irq 45 for MSI/MSI-X [ 0.705284] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [ 0.705286] [drm] Driver supports precise vblank timestamp query. [ 0.757666] composite sync not supported [ 0.757702] fixme: max PWM is zero. [ 1.220708] composite sync not supported [ 1.239559] fbcon: inteldrmfb (fb0) is primary device [ 1.532030] Refined TSC clocksource calibration: 2194.499 MHz. [ 1.532034] Switching to clocksource tsc [ 1.763692] Console: switching to colour frame buffer device 160x50 [ 1.766367] fb0: inteldrmfb frame buffer device [ 1.766368] drm: registered panic notifier [ 1.806045] acpi device:06: registered as cooling_device0 [ 1.806169] input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:01/input/input4 [ 1.806175] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) [ 1.806205] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 ---------- While in 2.6.38 the message "[drm] Initialized..." came after 0.75s, in 3.[012] it's taking 1.8s. These kernels have similar configs, so I don't think it's because of new features. However I can not be sure it's intel's driver fault because the log is not much verbose. If I turn verbose logging, the timings and messages change a lot and it's difficult to compare those kernels. Do you know of major changes in the intel driver that might be causing this delay? My card is the following one: 00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07) Subsystem: Dell Device 02bb Flags: bus master, fast devsel, latency 0 Capabilities: <access denied> Kernel driver in use: agpgart-intel 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: <access denied> 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] Thanks Lucas De Marchi
