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 at 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 at gmail.com> > Cc: Jean-Christophe Plagniol-Villard <plagnioj at jcrosoft.com> > Cc: Tomi Valkeinen <tomi.valkeinen at ti.com> > Cc: linux-fbdev at vger.kernel.org > Cc: Jani Nikula <jani.nikula at linux.intel.com> > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk> (v1) > Signed-off-by: Daniel Vetter <daniel.vetter at 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"); > -------------- next part -------------- An HTML attachment was scrubbed... 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