Gentoo Archives: gentoo-user

From: Walter Dnes <waltdnes@××××××××.org>
To: Gentoo Users List <gentoo-user@l.g.o>
Subject: [gentoo-user] dmesg warning about mtrr: type mismatch and allocation failed
Date: Mon, 16 Aug 2010 04:03:45
Message-Id: 20100815232718.GA3864@waltdnes.org
1 I'm running 64-bit Gentoo on an Intel 4-core i3 with an Intel integrated
2 graphics controller. An excerpt from dmesg follows, with the video-
3 related stuff. Note the two lines that I've split off. They mention
4 the mtrr type mismatch and the allocation failure. Is this a problem
5 and if so, what do I do about it?
6
7 [ 0.519939] Linux agpgart interface v0.103
8 [ 0.520016] agpgart-intel 0000:00:00.0: Intel HD Graphics Chipset
9 [ 0.520842] agpgart-intel 0000:00:00.0: detected 131068K stolen memory
10 [ 0.580462] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xd0000000
11 [ 0.580740] input: Power Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
12 [ 0.582896] ACPI: Power Button [PWRB]
13 [ 0.582986] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
14 [ 0.583063] ACPI: Power Button [PWRF]
15 [ 0.583301] Monitor-Mwait will be used to enter C-1 state
16 [ 0.583314] Monitor-Mwait will be used to enter C-3 state
17 [ 0.583325] Monitor-Mwait will be used to enter C-3 state
18 [ 0.586808] [drm] Initialized drm 1.1.0 20060810
19 [ 0.586877] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
20 [ 0.586934] i915 0000:00:02.0: setting latency timer to 64
21
22 [ 0.608643] mtrr: type mismatch for d0000000,10000000 old: write-back new: write-combining
23 [ 0.608725] [drm] MTRR allocation failed. Graphics performance may suffer.
24
25 [ 0.608815] i915 0000:00:02.0: irq 26 for MSI/MSI-X
26 [ 0.608819] [drm] set up 127M of stolen space
27 [ 0.946741] Console: switching to colour frame buffer device 240x75
28 [ 0.952156] fb0: inteldrmfb frame buffer device
29 [ 0.952176] registered panic notifier
30 [ 0.952208] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
31
32 And here is an excerpt from "lspci -vv"
33
34 00:02.0 VGA compatible controller: Intel Corporation Clarkdale
35 Integrated Graphics Controller (rev 12) (prog-if 00 [VGA controller])
36 Subsystem: Micro-Star International Co., Ltd. Device 7636
37 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
38 Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
39 Latency: 0
40 Interrupt: pin A routed to IRQ 26
41 Region 0: Memory at fb800000 (64-bit, non-prefetchable) [size=4M]
42 Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M]
43 Region 4: I/O ports at cc00 [size=8]
44 Expansion ROM at <unassigned> [disabled]
45 Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
46 Address: fee0f00c Data: 4161
47 Capabilities: [d0] Power Management version 2
48 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
49 Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
50 Capabilities: [a4] PCI Advanced Features
51 AFCap: TP+ FLR+
52 AFCtrl: FLR-
53 AFStatus: TP-
54 Kernel driver in use: i915
55
56 --
57 Walter Dnes <waltdnes@××××××××.org>

Replies