Re: [PATCH 5/5] drm/i915: Kick out vga console

Ed Tomlinson
2014-06-28T19:35:07Z

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Hi

This commit ( a4de05268e674e8ed31df6348269e22d6c6a1803 ) hangs my boot with 3.16-git. Reverting it lets the boot proceed.

I have an i7 with a built-in i915 and an pcie r7 260x. The R7 is the primary console. The i915 is initialized
but does not have a physical display attached.

With the patch applied the boot stops at the messages:

[drm] Memory usable by graphics device = 2048M
[drm] Replacing VGA console driver

and I need to interrupt or power off the box to get it back.

(I did not notice messages about the R7 but they could have easily been missed - this box does not have a serial console)

Without the patch I get:

Jun 28 14:53:54 localhost kernel: [ 2.075351] e1000e: Intel(R) PRO/1000 Network Driver - 2.3.2-k
Jun 28 14:53:54 localhost kernel: [ 2.075796] [drm] Initialized drm 1.1.0 20060810
Jun 28 14:53:54 localhost kernel: [ 2.075958] microcode: CPU0 sig=0x306c3, pf=0x2, revision=0x17
Jun 28 14:53:54 localhost kernel: [ 2.077289] microcode: CPU1 sig=0x306c3, pf=0x2, revision=0x17
Jun 28 14:53:54 localhost kernel: [ 2.077299] microcode: CPU2 sig=0x306c3, pf=0x2, revision=0x17
Jun 28 14:53:54 localhost kernel: [ 2.077307] microcode: CPU3 sig=0x306c3, pf=0x2, revision=0x17
Jun 28 14:53:54 localhost kernel: [ 2.077315] microcode: CPU4 sig=0x306c3, pf=0x2, revision=0x17
Jun 28 14:53:54 localhost kernel: [ 2.077325] microcode: CPU5 sig=0x306c3, pf=0x2, revision=0x17
Jun 28 14:53:54 localhost kernel: [ 2.077335] microcode: CPU6 sig=0x306c3, pf=0x2, revision=0x17
Jun 28 14:53:54 localhost kernel: [ 2.077342] microcode: CPU7 sig=0x306c3, pf=0x2, revision=0x17
Jun 28 14:53:54 localhost kernel: [ 2.077378] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
Jun 28 14:53:54 localhost kernel: [ 2.079726] input: PC Speaker as /devices/platform/pcspkr/input/input4
Jun 28 14:53:54 localhost kernel: [ 2.083930] e1000e: Copyright(c) 1999 - 2014 Intel Corporation.
Jun 28 14:53:54 localhost kernel: [ 2.084787] ACPI Warning: SystemIO range 0x000000000000f040-0x000000000000f05f conflicts with OpRegion 0x000000000000f040-0x000000000000f04f (\_SB_.PCI0.SBUS.SMBI) (20140424/utaddress-258)
Jun 28 14:53:54 localhost kernel: [ 2.084788] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
Jun 28 14:53:54 localhost kernel: [ 2.084894] e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
Jun 28 14:53:54 localhost kernel: [ 2.084905] e1000e 0000:00:19.0: irq 44 for MSI/MSI-X
Jun 28 14:53:54 localhost kernel: [ 2.096721] iTCO_vendor_support: vendor-support=0
Jun 28 14:53:54 localhost kernel: [ 2.096780] AVX2 version of gcm_enc/dec engaged.
Jun 28 14:53:54 localhost kernel: [ 2.098512] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
Jun 28 14:53:54 localhost kernel: [ 2.099042] iTCO_wdt: Found a Lynx Point TCO device (Version=2, TCOBASE=0x1860)
Jun 28 14:53:54 localhost kernel: [ 2.099561] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
Jun 28 14:53:54 localhost kernel: [ 2.100401] [drm] radeon kernel modesetting enabled.
Jun 28 14:53:54 localhost kernel: [ 2.100918] checking generic (e0000000 300000) vs hw (e0000000 10000000)
Jun 28 14:53:54 localhost kernel: [ 2.100919] fb: switching to radeondrmfb from simple
Jun 28 14:53:54 localhost kernel: [ 2.101372] Console: switching to colour dummy device 80x25
Jun 28 14:53:54 localhost kernel: [ 2.101527] [drm] initializing kernel modesetting (BONAIRE 0x1002:0x6658 0x174B:0xE253).
Jun 28 14:53:54 localhost kernel: [ 2.101534] [drm] register mmio base: 0xF0800000
Jun 28 14:53:54 localhost kernel: [ 2.101535] [drm] register mmio size: 262144
Jun 28 14:53:54 localhost kernel: [ 2.101540] [drm] doorbell mmio base: 0xF0000000
Jun 28 14:53:54 localhost kernel: [ 2.101541] [drm] doorbell mmio size: 8388608
Jun 28 14:53:54 localhost kernel: [ 2.101579] ATOM BIOS: Bonaire
Jun 28 14:53:54 localhost kernel: [ 2.101627] radeon 0000:01:00.0: VRAM: 2048M 0x0000000000000000 - 0x000000007FFFFFFF (2048M used)
Jun 28 14:53:54 localhost kernel: [ 2.101629] radeon 0000:01:00.0: GTT: 1024M 0x0000000080000000 - 0x00000000BFFFFFFF
Jun 28 14:53:54 localhost kernel: [ 2.101630] [drm] Detected VRAM RAM=2048M, BAR=256M
Jun 28 14:53:54 localhost kernel: [ 2.101631] [drm] RAM width 128bits DDR
Jun 28 14:53:54 localhost kernel: [ 2.101659] [TTM] Zone kernel: Available graphics memory: 8145364 kiB
Jun 28 14:53:54 localhost kernel: [ 2.101660] [TTM] Zone dma32: Available graphics memory: 2097152 kiB
Jun 28 14:53:54 localhost kernel: [ 2.101662] [TTM] Initializing pool allocator
Jun 28 14:53:54 localhost kernel: [ 2.101664] [TTM] Initializing DMA pool allocator
Jun 28 14:53:54 localhost kernel: [ 2.101674] [drm] radeon: 2048M of VRAM memory ready
Jun 28 14:53:54 localhost kernel: [ 2.101675] [drm] radeon: 1024M of GTT memory ready.
Jun 28 14:53:54 localhost kernel: [ 2.101681] [drm] Loading BONAIRE Microcode
Jun 28 14:53:54 localhost kernel: [ 2.109479] [drm] radeon/BONAIRE_mc2.bin: 31792 bytes
Jun 28 14:53:54 localhost kernel: [ 2.110510] [drm] Internal thermal controller with fan control
Jun 28 14:53:54 localhost kernel: [ 2.110648] [drm] probing gen 2 caps for device 8086:c01 = 261ad03/e
Jun 28 14:53:54 localhost kernel: [ 2.118508] [drm] radeon: dpm initialized
Jun 28 14:53:54 localhost kernel: [ 2.122133] [drm] Found VCE firmware/feedback version 40.2.2 / 15!
Jun 28 14:53:54 localhost kernel: [ 2.122140] [drm] GART: num cpu pages 262144, num gpu pages 262144
Jun 28 14:53:54 localhost kernel: [ 2.122540] [drm] probing gen 2 caps for device 8086:c01 = 261ad03/e
Jun 28 14:53:54 localhost kernel: [ 2.122544] [drm] PCIE gen 3 link speeds already enabled
Jun 28 14:53:54 localhost kernel: [ 2.126118] Adding 5779452k swap on /dev/sdc2. Priority:-1 extents:1 across:5779452k FS
Jun 28 14:53:54 localhost kernel: [ 2.133031] EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: discard
Jun 28 14:53:54 localhost kernel: [ 2.136552] [drm] PCIE GART of 1024M enabled (table at 0x000000000078B000).
Jun 28 14:53:54 localhost kernel: [ 2.136670] radeon 0000:01:00.0: WB enabled
Jun 28 14:53:54 localhost kernel: [ 2.136697] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000080000c00 and cpu addr 0xffff8802683e6c00
Jun 28 14:53:54 localhost kernel: [ 2.136699] radeon 0000:01:00.0: fence driver on ring 1 use gpu addr 0x0000000080000c04 and cpu addr 0xffff8802683e6c04
Jun 28 14:53:54 localhost kernel: [ 2.136701] radeon 0000:01:00.0: fence driver on ring 2 use gpu addr 0x0000000080000c08 and cpu addr 0xffff8802683e6c08
Jun 28 14:53:54 localhost kernel: [ 2.136703] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000080000c0c and cpu addr 0xffff8802683e6c0c
Jun 28 14:53:54 localhost kernel: [ 2.136705] radeon 0000:01:00.0: fence driver on ring 4 use gpu addr 0x0000000080000c10 and cpu addr 0xffff8802683e6c10
Jun 28 14:53:54 localhost kernel: [ 2.137230] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x0000000000076c98 and cpu addr 0xffffc90007936c98
Jun 28 14:53:54 localhost kernel: [ 2.137293] radeon 0000:01:00.0: fence driver on ring 6 use gpu addr 0x0000000080000c18 and cpu addr 0xffff8802683e6c18
Jun 28 14:53:54 localhost kernel: [ 2.137296] radeon 0000:01:00.0: fence driver on ring 7 use gpu addr 0x0000000080000c1c and cpu addr 0xffff8802683e6c1c
Jun 28 14:53:54 localhost kernel: [ 2.137298] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
Jun 28 14:53:54 localhost kernel: [ 2.137299] [drm] Driver supports precise vblank timestamp query.
Jun 28 14:53:54 localhost kernel: [ 2.137325] radeon 0000:01:00.0: irq 45 for MSI/MSI-X
Jun 28 14:53:54 localhost kernel: [ 2.137331] radeon 0000:01:00.0: radeon: using MSI.
Jun 28 14:53:54 localhost kernel: [ 2.137357] [drm] radeon: irq initialized.
Jun 28 14:53:54 localhost kernel: [ 2.139870] [drm] ring test on 0 succeeded in 3 usecs
Jun 28 14:53:54 localhost kernel: [ 2.139938] [drm] ring test on 1 succeeded in 3 usecs
Jun 28 14:53:54 localhost kernel: [ 2.139950] [drm] ring test on 2 succeeded in 3 usecs
Jun 28 14:53:54 localhost kernel: [ 2.140110] [drm] ring test on 3 succeeded in 2 usecs
Jun 28 14:53:54 localhost kernel: [ 2.140116] [drm] ring test on 4 succeeded in 1 usecs
Jun 28 14:53:54 localhost kernel: [ 2.142659] Adding 5779452k swap on /dev/sdb2. Priority:-2 extents:1 across:5779452k FS
Jun 28 14:53:54 localhost kernel: [ 2.152066] usb 1-7: new full-speed USB device number 6 using xhci_hcd
Jun 28 14:53:54 localhost kernel: [ 2.185418] raid6: sse2x1 13222 MB/s
Jun 28 14:53:54 localhost kernel: [ 2.196219] [drm] ring test on 5 succeeded in 1 usecs
Jun 28 14:53:54 localhost kernel: [ 2.216257] [drm] UVD initialized successfully.
Jun 28 14:53:54 localhost kernel: [ 2.242145] raid6: sse2x2 17003 MB/s
Jun 28 14:53:54 localhost kernel: [ 2.259077] e1000e 0000:00:19.0 eth0: registered PHC clock
Jun 28 14:53:54 localhost kernel: [ 2.259080] e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) bc:5f:f4:fc:fa:91
Jun 28 14:53:54 localhost kernel: [ 2.259081] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection
Jun 28 14:53:54 localhost kernel: [ 2.259119] e1000e 0000:00:19.0 eth0: MAC: 11, PHY: 12, PBA No: FFFFFF-0FF
Jun 28 14:53:54 localhost kernel: [ 2.262208] snd_hda_intel 0000:00:1b.0: irq 46 for MSI/MSI-X
Jun 28 14:53:54 localhost kernel: [ 2.265424] nct6775: Found NCT6776D/F or compatible chip at 0x2e:0x290
Jun 28 14:53:54 localhost kernel: [ 2.286592] sound hdaudioC0D0: ALC1150: SKU not ready 0x00000000
Jun 28 14:53:54 localhost kernel: [ 2.286961] sound hdaudioC0D0: autoconfig: line_outs=3 (0x14/0x15/0x16/0x0/0x0) type:line
Jun 28 14:53:54 localhost kernel: [ 2.286963] sound hdaudioC0D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
Jun 28 14:53:54 localhost kernel: [ 2.286965] sound hdaudioC0D0: hp_outs=1 (0x1b/0x0/0x0/0x0/0x0)
Jun 28 14:53:54 localhost kernel: [ 2.286966] sound hdaudioC0D0: mono: mono_out=0x0
Jun 28 14:53:54 localhost kernel: [ 2.286967] sound hdaudioC0D0: dig-out=0x1e/0x0
Jun 28 14:53:54 localhost kernel: [ 2.286968] sound hdaudioC0D0: inputs:
Jun 28 14:53:54 localhost kernel: [ 2.286970] sound hdaudioC0D0: Front Mic=0x19
Jun 28 14:53:54 localhost kernel: [ 2.286971] sound hdaudioC0D0: Rear Mic=0x18
Jun 28 14:53:54 localhost kernel: [ 2.286972] sound hdaudioC0D0: Line=0x1a
Jun 28 14:53:54 localhost kernel: [ 2.297632] input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1b.0/sound/card0/hdaudioC0D0/input5
Jun 28 14:53:54 localhost kernel: [ 2.297798] input: HDA Intel PCH Front Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input6
Jun 28 14:53:54 localhost kernel: [ 2.297835] input: HDA Intel PCH Rear Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input7
Jun 28 14:53:54 localhost kernel: [ 2.297869] input: HDA Intel PCH Line as /devices/pci0000:00/0000:00:1b.0/sound/card0/input8
Jun 28 14:53:54 localhost kernel: [ 2.297905] input: HDA Intel PCH Line Out Front as /devices/pci0000:00/0000:00:1b.0/sound/card0/input9
Jun 28 14:53:54 localhost kernel: [ 2.297940] input: HDA Intel PCH Line Out Surround as /devices/pci0000:00/0000:00:1b.0/sound/card0/input10
Jun 28 14:53:54 localhost kernel: [ 2.297973] input: HDA Intel PCH Line Out CLFE as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11
Jun 28 14:53:54 localhost kernel: [ 2.298005] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12
Jun 28 14:53:54 localhost kernel: [ 2.298888] raid6: sse2x4 18101 MB/s
Jun 28 14:53:54 localhost kernel: [ 2.306396] zram: unknown parameter '#32' ignored
Jun 28 14:53:54 localhost kernel: [ 2.306399] zram: unknown parameter 'is' ignored
Jun 28 14:53:54 localhost kernel: [ 2.306400] zram: unknown parameter 'max' ignored
Jun 28 14:53:54 localhost kernel: [ 2.306401] zram: unknown parameter 'zram' ignored
Jun 28 14:53:54 localhost kernel: [ 2.306402] zram: unknown parameter 'devices' ignored
Jun 28 14:53:54 localhost kernel: [ 2.312100] zram: Created 32 device(s) ...
Jun 28 14:53:54 localhost kernel: [ 2.327478] [drm] ring test on 6 succeeded in 22 usecs
Jun 28 14:53:54 localhost kernel: [ 2.327492] [drm] ring test on 7 succeeded in 4 usecs
Jun 28 14:53:54 localhost kernel: [ 2.327493] [drm] VCE initialized successfully.
Jun 28 14:53:54 localhost kernel: [ 2.327763] [drm] ib test on ring 0 succeeded in 0 usecs
Jun 28 14:53:54 localhost kernel: [ 2.327925] [drm] ib test on ring 1 succeeded in 0 usecs
Jun 28 14:53:54 localhost kernel: [ 2.328079] [drm] ib test on ring 2 succeeded in 0 usecs
Jun 28 14:53:54 localhost kernel: [ 2.328237] [drm] ib test on ring 3 succeeded in 0 usecs
Jun 28 14:53:54 localhost kernel: [ 2.328394] [drm] ib test on ring 4 succeeded in 0 usecs
Jun 28 14:53:54 localhost kernel: [ 2.328707] usb 1-7: ep 0x85 - rounding interval to 64 microframes, ep desc says 80 microframes
Jun 28 14:53:54 localhost kernel: [ 2.340997] Adding 254540k swap on /dev/zram0. Priority:32767 extents:1 across:254540k SSFS
Jun 28 14:53:54 localhost kernel: [ 2.341054] Adding 254540k swap on /dev/zram1. Priority:32767 extents:1 across:254540k SSFS
Jun 28 14:53:54 localhost kernel: [ 2.341110] Adding 254540k swap on /dev/zram2. Priority:32767 extents:1 across:254540k SSFS
Jun 28 14:53:54 localhost kernel: [ 2.341162] Adding 254540k swap on /dev/zram3. Priority:32767 extents:1 across:254540k SSFS
Jun 28 14:53:54 localhost kernel: [ 2.343872] [drm] ib test on ring 5 succeeded
Jun 28 14:53:54 localhost kernel: [ 2.355627] raid6: avx2x1 16273 MB/s
Jun 28 14:53:54 localhost kernel: [ 2.364832] [drm] ib test on ring 6 succeeded
Jun 28 14:53:54 localhost kernel: [ 2.365591] [drm] ib test on ring 7 succeeded
Jun 28 14:53:54 localhost kernel: [ 2.366015] [drm] Radeon Display Connectors
Jun 28 14:53:54 localhost kernel: [ 2.366018] [drm] Connector 0:
Jun 28 14:53:54 localhost kernel: [ 2.366019] [drm] DP-1
Jun 28 14:53:54 localhost kernel: [ 2.366020] [drm] HPD2
Jun 28 14:53:54 localhost kernel: [ 2.366022] [drm] DDC: 0x6530 0x6530 0x6534 0x6534 0x6538 0x6538 0x653c 0x653c
Jun 28 14:53:54 localhost kernel: [ 2.366024] [drm] Encoders:
Jun 28 14:53:54 localhost kernel: [ 2.366026] [drm] DFP1: INTERNAL_UNIPHY2
Jun 28 14:53:54 localhost kernel: [ 2.366027] [drm] Connector 1:
Jun 28 14:53:54 localhost kernel: [ 2.366028] [drm] HDMI-A-1
Jun 28 14:53:54 localhost kernel: [ 2.366030] [drm] HPD3
Jun 28 14:53:54 localhost kernel: [ 2.366032] [drm] DDC: 0x6550 0x6550 0x6554 0x6554 0x6558 0x6558 0x655c 0x655c
Jun 28 14:53:54 localhost kernel: [ 2.366033] [drm] Encoders:
Jun 28 14:53:54 localhost kernel: [ 2.366035] [drm] DFP2: INTERNAL_UNIPHY2
Jun 28 14:53:54 localhost kernel: [ 2.366036] [drm] Connector 2:
Jun 28 14:53:54 localhost kernel: [ 2.366037] [drm] DVI-D-1
Jun 28 14:53:54 localhost kernel: [ 2.366039] [drm] HPD1
Jun 28 14:53:54 localhost kernel: [ 2.366041] [drm] DDC: 0x6560 0x6560 0x6564 0x6564 0x6568 0x6568 0x656c 0x656c
Jun 28 14:53:54 localhost kernel: [ 2.366043] [drm] Encoders:
Jun 28 14:53:54 localhost kernel: [ 2.366044] [drm] DFP3: INTERNAL_UNIPHY1
Jun 28 14:53:54 localhost kernel: [ 2.366045] [drm] Connector 3:
Jun 28 14:53:54 localhost kernel: [ 2.366046] [drm] DVI-I-1
Jun 28 14:53:54 localhost kernel: [ 2.366048] [drm] HPD6
Jun 28 14:53:54 localhost kernel: [ 2.366049] [drm] DDC: 0x6580 0x6580 0x6584 0x6584 0x6588 0x6588 0x658c 0x658c
Jun 28 14:53:54 localhost kernel: [ 2.366051] [drm] Encoders:
Jun 28 14:53:54 localhost kernel: [ 2.366052] [drm] DFP4: INTERNAL_UNIPHY
Jun 28 14:53:54 localhost kernel: [ 2.366053] [drm] CRT1: INTERNAL_KLDSCP_DAC1
Jun 28 14:53:54 localhost kernel: [ 2.412356] raid6: avx2x2 20798 MB/s
Jun 28 14:53:54 localhost kernel: [ 2.412358] Switched to clocksource tsc
Jun 28 14:53:54 localhost kernel: [ 2.439066] usb 1-8: new low-speed USB device number 7 using xhci_hcd
Jun 28 14:53:54 localhost kernel: [ 2.442481] e1000e 0000:00:19.0: irq 47 for MSI/MSI-X
Jun 28 14:53:54 localhost kernel: [ 2.464181] [drm] fb mappable at 0xE098E000
Jun 28 14:53:54 localhost kernel: [ 2.464183] [drm] vram apper at 0xE0000000
Jun 28 14:53:54 localhost kernel: [ 2.464184] [drm] size 9216000
Jun 28 14:53:54 localhost kernel: [ 2.464185] [drm] fb depth is 24
Jun 28 14:53:54 localhost kernel: [ 2.464186] [drm] pitch is 7680
Jun 28 14:53:54 localhost kernel: [ 2.464227] fbcon: radeondrmfb (fb0) is primary device
Jun 28 14:53:54 localhost kernel: [ 2.469074] raid6: avx2x4 24141 MB/s
Jun 28 14:53:54 localhost kernel: [ 2.469074] raid6: using algorithm avx2x4 (24141 MB/s)
Jun 28 14:53:54 localhost kernel: [ 2.469075] raid6: using avx2x2 recovery algorithm
Jun 28 14:53:54 localhost kernel: [ 2.469466] xor: automatically using best checksumming function:
Jun 28 14:53:54 localhost kernel: [ 2.484840] Console: switching to colour frame buffer device 240x75
Jun 28 14:53:54 localhost kernel: [ 2.487822] radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
Jun 28 14:53:54 localhost kernel: [ 2.487836] radeon 0000:01:00.0: registered panic notifier
Jun 28 14:53:54 localhost kernel: [ 2.502444] avx : 41036.400 MB/sec
Jun 28 14:53:54 localhost kernel: [ 2.510424] Btrfs loaded
Jun 28 14:53:54 localhost kernel: [ 2.510765] BTRFS: device fsid 9d4254aa-6715-4fa8-986a-1af0d51768ad devid 1 transid 303773 /dev/sdc1
Jun 28 14:53:54 localhost kernel: [ 2.510907] BTRFS: device fsid 9d4254aa-6715-4fa8-986a-1af0d51768ad devid 2 transid 303773 /dev/sdb1
Jun 28 14:53:54 localhost kernel: [ 2.513700] [drm] Initialized radeon 2.39.0 20080528 for 0000:01:00.0 on minor 0
Jun 28 14:53:54 localhost kernel: [ 2.513800] snd_hda_intel 0000:01:00.1: Handle VGA-switcheroo audio client
Jun 28 14:53:54 localhost kernel: [ 2.513878] snd_hda_intel 0000:01:00.1: irq 48 for MSI/MSI-X
Jun 28 14:53:54 localhost kernel: [ 2.513971] [drm] Memory usable by graphics device = 2048M
Jun 28 14:53:54 localhost kernel: [ 2.520123] input: HD-Audio Generic HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input13
Jun 28 14:53:54 localhost kernel: [ 2.520184] input: HD-Audio Generic HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input14
Jun 28 14:53:54 localhost kernel: [ 2.520258] input: HD-Audio Generic HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input15
Jun 28 14:53:54 localhost kernel: [ 2.520368] input: HD-Audio Generic HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input16
Jun 28 14:53:54 localhost kernel: [ 2.520440] input: HD-Audio Generic HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input17
Jun 28 14:53:54 localhost kernel: [ 2.521215] input: HD-Audio Generic HDMI/DP,pcm=11 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input18
Jun 28 14:53:54 localhost kernel: [ 2.532558] i915 0000:00:02.0: irq 49 for MSI/MSI-X
Jun 28 14:53:54 localhost kernel: [ 2.532565] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
Jun 28 14:53:54 localhost kernel: [ 2.532580] [drm] Driver supports precise vblank timestamp query.
Jun 28 14:53:54 localhost kernel: [ 2.532607] vgaarb: device changed decodes: PCI:0000:01:00.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
Jun 28 14:53:54 localhost kernel: [ 2.545934] e1000e 0000:00:19.0: irq 50 for MSI/MSI-X
Jun 28 14:53:54 localhost kernel: [ 2.546018] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Jun 28 14:53:54 localhost kernel: [ 2.619122] usb 1-8: ep 0x81 - rounding interval to 512 microframes, ep desc says 800 microframes
Jun 28 14:53:54 localhost kernel: [ 2.759949] i915 0000:00:02.0: fb1: inteldrmfb frame buffer device
Jun 28 14:53:54 localhost kernel: [ 2.760226] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 1
Jun 28 14:53:54 localhost kernel: [ 2.779511] usb 1-14: new high-speed USB device number 8 using xhci_hcd

I am willing to try patches.

Please fix or revert this commit.

Thanks,
Ed Tomlinson

On Thursday 05 June 2014 16:58:28 Daniel Vetter wrote:
> Touching the VGA resources on an IVB EFI machine causes hard hangs when
> we then kick out the efifb. Ouch.
>
> Apparently this also prevents unclaimed register errors on hsw and
> hard machine hangs on my i855gm when trying to unbind fbcon.
>
> Also, we want this to make I915_FBDEV=n safe.
>
> v2: Rebase and pimp commit message.
>
> v3: We also need to unregister the vga console, otherwise the unbind
> of the fb console before module unload might resurrect it again.
>
> v4: Ignore errors when the vga console is already unregistered - this
> can happen when e.g. reloading i915.ko.
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67813
> Cc: David Herrmann <dh.herrmann@gmail.com>
> Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Cc: linux-fbdev@vger.kernel.org
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> (v1)
> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
> drivers/gpu/drm/i915/i915_dma.c | 43 +++++++++++++++++++++++++++++++++++++++-
> drivers/video/console/dummycon.c | 1 +
> drivers/video/console/vgacon.c | 1 +
> 3 files changed, 44 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 27fe65ac5940..bcb66ddd649e 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -36,6 +36,8 @@
> #include "i915_drv.h"
> #include "i915_trace.h"
> #include <linux/pci.h>
> +#include <linux/console.h>
> +#include <linux/vt.h>
> #include <linux/vgaarb.h>
> #include <linux/acpi.h>
> #include <linux/pnp.h>
> @@ -1449,6 +1451,38 @@ static void i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
> }
> #endif
>
> +#if !defined(CONFIG_VGA_CONSOLE)
> +static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
> +{
> + return 0;
> +}
> +#elif !defined(CONFIG_DUMMY_CONSOLE)
> +static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
> +{
> + return -ENODEV;
> +}
> +#else
> +static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
> +{
> + int ret;
> +
> + DRM_INFO("Replacing VGA console driver\n");
> +
> + console_lock();
> + ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
> + if (ret == 0) {
> + ret = do_unregister_con_driver(&vga_con);
> +
> + /* Ignore "already unregistered". */
> + if (ret == -ENODEV)
> + ret = 0;
> + }
> + console_unlock();
> +
> + return ret;
> +}
> +#endif
> +
> static void i915_dump_device_info(struct drm_i915_private *dev_priv)
> {
> const struct intel_device_info *info = &dev_priv->info;
> @@ -1622,8 +1656,15 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
> if (ret)
> goto out_regs;
>
> - if (drm_core_check_feature(dev, DRIVER_MODESET))
> + if (drm_core_check_feature(dev, DRIVER_MODESET)) {
> + ret = i915_kick_out_vgacon(dev_priv);
> + if (ret) {
> + DRM_ERROR("failed to remove conflicting VGA console\n");
> + goto out_gtt;
> + }
> +
> i915_kick_out_firmware_fb(dev_priv);
> + }
>
> pci_set_master(dev->pdev);
>
> diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c
> index b63860f7beab..40bec8d64b0a 100644
> --- a/drivers/video/console/dummycon.c
> +++ b/drivers/video/console/dummycon.c
> @@ -77,3 +77,4 @@ const struct consw dummy_con = {
> .con_set_palette = DUMMY,
> .con_scrolldelta = DUMMY,
> };
> +EXPORT_SYMBOL_GPL(dummy_con);
> diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
> index 9d8feac67637..84acd6223dc5 100644
> --- a/drivers/video/console/vgacon.c
> +++ b/drivers/video/console/vgacon.c
> @@ -1440,5 +1440,6 @@ const struct consw vga_con = {
> .con_build_attr = vgacon_build_attr,
> .con_invert_region = vgacon_invert_region,
> };
> +EXPORT_SYMBOL(vga_con);
>
> MODULE_LICENSE("GPL");
>

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