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Message-ID: <CAMVG2st4KZOYk9qMK6FFRnJt0bCEz-0nFsQAa4zXc+sed_eVhQ@mail.gmail.com> Date: Wed, 28 Nov 2012 11:45:07 +0800 From: Daniel J Blueman <daniel@...ra.org> To: Seth Forshee <seth.forshee@...onical.com>, Dave Airlie <airlied@...ux.ie>, Takashi Iwai <tiwai@...e.de> Cc: Linux Kernel <linux-kernel@...r.kernel.org> Subject: switcheroo registration vs switching race... Hi Seth, Dave, Takashi, If I power down the unused discrete GPU before lightdm starts by fiddling with the sysfs file [1] in the upstart script, I see a race manifesting as the discrete GPU's HDA controller timing out to commands [2]. Adding some debug, I see that the registered audio devices are put into D3 before the GPU is, but it turns out that the discrete (and internal) GPU's HDA controller gets registered a bit later, so the list is empty. The symptom is since the HDA driver it's talking to hardware which is now in D3. We could add a mutex to nouveau to allow us to wait for the DGPU HDA controller, but perhaps this should be solved at a higher level in the vgaswitcheroo code; what do you think? Thanks, Daniel --- [1] echo OFF >/sys/kernel/debug/vgaswitcheroo/switch --- [2] snd_hda_intel 0000:00:1b.0: enabling device (0000 -> 0002) snd_hda_intel 0000:00:1b.0: irq 51 for MSI/MSI-X input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input10 input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11 nouveau [ VBIOS][0000:01:00.0] ... appears to be valid nouveau [ VBIOS][0000:01:00.0] using image from PRAMIN nouveau [ VBIOS][0000:01:00.0] BIT signature found nouveau [ VBIOS][0000:01:00.0] version 80.07.26.04 nouveau [ MXM][0000:01:00.0] no VBIOS data, nothing to do nouveau [ PFB][0000:01:00.0] RAM type: GDDR5 nouveau [ PFB][0000:01:00.0] RAM size: 1024 MiB nouveau W[ PGRAPH][0000:01:00.0] disabled, PGRAPH=1 to enable vga_switcheroo: enabled [TTM] Zone kernel: Available graphics memory: 4076308 kiB [TTM] Zone dma32: Available graphics memory: 2097152 kiB [TTM] Initializing pool allocator [TTM] Initializing DMA pool allocator nouveau [ DRM] VRAM: 1024 MiB nouveau [ DRM] GART: 512 MiB nouveau [ DRM] BIT BIOS found nouveau [ DRM] Bios version 80.07.26.04 nouveau [ DRM] TMDS table version 2.0 nouveau [ DRM] DCB version 4.0 nouveau [ DRM] DCB outp 00: 048101b6 0f230010 nouveau [ DRM] DCB outp 01: 018212d6 0f220020 nouveau [ DRM] DCB outp 02: 01021212 00020020 nouveau [ DRM] DCB outp 03: 088324c6 0f220010 nouveau [ DRM] DCB outp 04: 08032402 00020010 nouveau [ DRM] DCB outp 05: 02843862 00020010 nouveau [ DRM] DCB conn 00: 00020047 nouveau [ DRM] DCB conn 01: 02208146 nouveau [ DRM] DCB conn 02: 01104246 nouveau [ DRM] DCB conn 03: 00410361 [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [drm] No driver support for vblank timestamp query. nouveau W[ DRM] voltage table 0x50 unknown nouveau [ DRM] 4 available performance level(s) nouveau [ DRM] 1: core 209MHz shader 419MHz memory 405MHz voltage 520mV nouveau [ DRM] 2: core 390MHz shader 780MHz memory 1080MHz voltage 610mV nouveau [ DRM] 3: core 1000MHz shader 2000MHz memory 1080MHz voltage 630mV nouveau [ DRM] 4: core 1254MHz shader 2508MHz memory 1080MHz voltage 630mV nouveau [ DRM] c: nouveau E[ DRM] failed to create kernel channel, -22 No connectors reported connected with modes [drm] Cannot find any crtc or sizes - going 1024x768 nouveau [ DRM] allocated 1024x768 fb: 0x60000, bo ffff880264974400 fb1: nouveaufb frame buffer device [drm] Initialized nouveau 1.1.0 20120801 for 0000:01:00.0 on minor 1 snd_hda_intel 0000:01:00.1: enabling device (0000 -> 0002) hda-intel: 0000:01:00.1: Handle VGA-switcheroo audio client snd_hda_intel 0000:01:00.1: irq 52 for MSI/MSI-X VGA switcheroo: switched nouveau off nouveau [ DRM] suspending fbcon... nouveau [ DRM] suspending display... nouveau [ DRM] unpinning framebuffer(s)... nouveau [ DRM] evicting buffers... nouveau [ DRM] suspending client object trees... input: HDA NVidia HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input12 input: HDA NVidia HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input13 input: HDA NVidia HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input14 nouveau E[ I2C][0000:01:00.0] AUXCH(3): begin idle timeout 0xffffffff nouveau E[ I2C][0000:01:00.0] AUXCH(2): begin idle timeout 0xffffffff hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: spurious response 0x0:0x0, last cmd=0x170503 hda-intel: azx_get_response timeout, switching to polling mode: last cmd=0x001f0500 hda-intel: No response from codec, disabling MSI: last cmd=0x001f0500 hda_intel: azx_get_response timeout, switching to single_cmd mode: last cmd=0x001f0500 hda-codec: out of range cmd 0:0:4:707:ffffffff hda-codec: out of range cmd 0:0:4:707:fffffffc hda-codec: out of range cmd 0:0:4:707:ffffffff hda-codec: out of range cmd 0:0:4:707:fffffffc hda-codec: out of range cmd 0:0:4:707:ffffffbf hda-codec: out of range cmd 0:0:4:707:ffffffff hda-codec: out of range cmd 0:0:4:707:fffffffc hda-codec: out of range cmd 0:0:4:707:ffffffff hda-codec: out of range cmd 0:0:4:707:fffffffc hda-codec: out of range cmd 0:0:4:707:ffffffbf hda-codec: out of range cmd 0:0:5:707:ffffffff hda-codec: out of range cmd 0:0:5:707:fffffffc hda-codec: out of range cmd 0:0:5:707:ffffffff hda-codec: out of range cmd 0:0:5:707:fffffffc hda-codec: out of range cmd 0:0:5:707:ffffffbf hda-codec: out of range cmd 0:0:5:707:ffffffff hda-codec: out of range cmd 0:0:5:707:fffffffc hda-codec: out of range cmd 0:0:5:707:ffffffff hda-codec: out of range cmd 0:0:5:707:fffffffc hda-codec: out of range cmd 0:0:5:707:ffffffbf hda-codec: out of range cmd 0:0:7:707:ffffffff hda-codec: out of range cmd 0:0:7:707:fffffffc hda-codec: out of range cmd 0:0:7:707:ffffffff hda-codec: out of range cmd 0:0:7:707:fffffffc hda-codec: out of range cmd 0:0:7:707:ffffffbf hda-codec: out of range cmd 0:0:7:707:ffffffff hda-codec: out of range cmd 0:0:7:707:fffffffc hda-codec: out of range cmd 0:0:7:707:ffffffff hda-codec: out of range cmd 0:0:7:707:fffffffc hda-codec: out of range cmd 0:0:7:707:ffffffbf hda-codec: out of range cmd 0:0:4:707:ffffffff hda-codec: out of range cmd 0:0:4:707:fffffffc hda-codec: out of range cmd 0:0:4:707:ffffffff hda-codec: out of range cmd 0:0:4:707:fffffffc azx_single_send_cmd: 179 callbacks suppressed hda-codec: out of range cmd 0:0:4:707:ffffffbf hda-codec: out of range cmd 0:0:4:707:ffffffff hda-codec: out of range cmd 0:0:4:707:fffffffc hda-codec: out of range cmd 0:0:4:707:ffffffff hda-codec: out of range cmd 0:0:4:707:fffffffc hda-codec: out of range cmd 0:0:4:707:ffffffbf hda-codec: out of range cmd 0:0:4:707:ffffffff hda-codec: out of range cmd 0:0:4:707:fffffffc hda-codec: out of range cmd 0:0:4:707:ffffffff hda-codec: out of range cmd 0:0:4:707:fffffffc hda-codec: out of range cmd 0:0:4:707:ffffffbf hda-codec: out of range cmd 0:0:5:707:ffffffff hda-codec: out of range cmd 0:0:5:707:fffffffc hda-codec: out of range cmd 0:0:5:707:ffffffff hda-codec: out of range cmd 0:0:5:707:fffffffc hda-codec: out of range cmd 0:0:5:707:ffffffbf hda-codec: out of range cmd 0:0:5:707:ffffffff hda-codec: out of range cmd 0:0:5:707:fffffffc hda-codec: out of range cmd 0:0:5:707:ffffffff hda-codec: out of range cmd 0:0:5:707:fffffffc hda-codec: out of range cmd 0:0:5:707:ffffffbf hda-codec: out of range cmd 0:0:7:707:ffffffff hda-codec: out of range cmd 0:0:7:707:fffffffc hda-codec: out of range cmd 0:0:7:707:ffffffff hda-codec: out of range cmd 0:0:7:707:fffffffc hda-codec: out of range cmd 0:0:7:707:ffffffbf hda-codec: out of range cmd 0:0:7:707:ffffffff hda-codec: out of range cmd 0:0:7:707:fffffffc hda-codec: out of range cmd 0:0:7:707:ffffffff hda-codec: out of range cmd 0:0:7:707:fffffffc hda-codec: out of range cmd 0:0:7:707:ffffffbf -- Daniel J Blueman -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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