Comment # 7
on bug 104835
from Andrei Borzenkov
Have it on Dell Latitude E5450 00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) 03:00.0 3D controller [0302]: NVIDIA Corporation GM108M [GeForce 830M] [10de:1340] (rev a2) VERSION="18.04.1 LTS (Bionic Beaver)" Linux bor-Latitude-E5450 4.18.0-13-generic #14~18.04.1-Ubuntu SMP Thu Dec 6 14:09:52 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux Dec 20 21:10:10 bor-Latitude-E5450 kernel: fb: switching to inteldrmfb from EFI VGA Dec 20 21:10:10 bor-Latitude-E5450 kernel: Console: switching to colour dummy device 80x25 Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] Replacing VGA console driver Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] ACPI BIOS requests an excessive sleep of 20000 ms, using 1500 ms instead Dec 20 21:10:10 bor-Latitude-E5450 kernel: MXM: GUID detected in BIOS Dec 20 21:10:10 bor-Latitude-E5450 kernel: ACPI Warning: \_SB.PCI0.RP05.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20180531/nsarguments-66) Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] Driver supports precise vblank timestamp query. Dec 20 21:10:10 bor-Latitude-E5450 kernel: pci 0000:03:00.0: optimus capabilities: enabled, status dynamic power, hda bios codec supported Dec 20 21:10:10 bor-Latitude-E5450 kernel: VGA switcheroo: detected Optimus DSM method \_SB_.PCI0.RP05.PEGP handle Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau: detected PR support, will not use DSM Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: enabling device (0006 -> 0007) Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: NVIDIA GM108 (118000a2) Dec 20 21:10:10 bor-Latitude-E5450 kernel: i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] Initialized i915 1.6.0 20180514 for 0000:00:02.0 on minor 0 Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: bios: version 82.08.18.00.2a Dec 20 21:10:10 bor-Latitude-E5450 kernel: ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: fb: 2048 MiB DDR3 Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: bus: MMIO read of 00000000 FAULT at 6013d4 [ IBUS ] Dec 20 21:10:10 bor-Latitude-E5450 kernel: input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input7 Dec 20 21:10:10 bor-Latitude-E5450 kernel: ACPI: Video Device [PEGP] (multi-head: no rom: yes post: no) Dec 20 21:10:10 bor-Latitude-E5450 kernel: input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1d/LNXVIDEO:01/input/input8 Dec 20 21:10:10 bor-Latitude-E5450 kernel: fbcon: inteldrmfb (fb0) is primary device Dec 20 21:10:10 bor-Latitude-E5450 kernel: Console: switching to colour frame buffer device 240x67 Dec 20 21:10:10 bor-Latitude-E5450 kernel: i915 0000:00:02.0: fb0: inteldrmfb frame buffer device Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: bus: MMIO read of 00000000 FAULT at 10ac08 [ IBUS ] Dec 20 21:10:10 bor-Latitude-E5450 kernel: vga_switcheroo: enabled Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: DRM: GART: 1048576 MiB Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: DRM: Pointer to TMDS table invalid Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: DRM: DCB version 4.0 Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: DRM: MM: using COPY for buffer copies Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] Initialized nouveau 1.3.1 20120801 for 0000:03:00.0 on minor 1 The read fault at 10ac08 happens only ones during system boot, read fault 6013d4 happens apparently every time I suspend/resume.
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