Bug 204199
| Summary: | HDMI audio changes the ELD pin node after resume from suspend mode | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | jian-hong |
| Component: | Sound(ALSA) | Assignee: | Jaroslav Kysela (perex) |
| Status: | NEW --- | ||
| Severity: | normal | CC: | andrey+kernel, drake, tiwai |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 5.2 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Bug Depends on: | |||
| Bug Blocks: | 208829 | ||
| Attachments: |
dmesg log
alsa-info before suspend alsa-info after resume pactl before suspend pactl after resume Test patch dmesg with attachment 283813 Temp alsa-info mentioned in Comment 10 |
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Created attachment 283765 [details]
alsa-info before suspend
Created attachment 283767 [details]
alsa-info after resume
Created attachment 283769 [details]
pactl before suspend
Created attachment 283771 [details]
pactl after resume
This issue will make Pulse Audio choose wrong profile and become Dummy Output, then cannot output sound. before suspend: alsa_output.pci-0000_01_00.1.hdmi-stereo-extra1 after resume: Dummy Output Does this happen with nouveau driver? I suspect it's specific to Nvidia binary driver. I had tried nouveau, but system cannot resume back after suspend. I also cannot ssh into the system. Also tried nouveau's parameters: * runpm=0: System cannot resume back after suspend * noaccel=1: System logouts user automatically * runpm=0 and noaccel=1: Same as noaccel=1 * modeset=0: System cannot load X So, nouveau cannot be used on this desktop. I also filed this bug to NVIDIA's devtalk https://devtalk.nvidia.com/default/topic/1057448/linux/hdmi-audio-changes-the-eld-pin-node-after-resume-from-suspend-mode/ A possible workaround would be to delay the jack detection at resume forcibly, a patch like below (totally untested). But this can't be merged to upstream as-is, of course, because it's merely an ultra-ugly hack. Created attachment 283813 [details]
Test patch
Created attachment 283831 [details] dmesg with attachment 283813 [details] I tried the patch attachment 283813 [details]. But it makes system have no HDMI audio. The alsa-info shows "cat: /proc/asound/modules: No such file or directory". However, I notice there are some temp files in /tmp/alsa-info.XXXXX. I will upload them as a tarball later. Other desktop equipped with i9-9900K and NVIDA GeForce RTX 2080 also hits this issue. Created attachment 283833 [details] Temp alsa-info mentioned in Comment 10 I think this issue is likely specific to the nvidia binary driver. As described at https://download.nvidia.com/XFree86/gpu-hdmi-audio-document/#_driver_architecture the nvidia driver will do some magic in order to make the ELD appear. It's really weird how it moves between pins after suspend/resume, but actually ignoring that detail, ALSA's view of the resulting setup is accurate and working fine. This only causes a user-visible problem due to pulseaudio exposing unavailable profiles which we've now reported at https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/708 so this issue can probably be closed. The biggest problem here is that the HD-audio driver goes into single_cmd mode as fallback for the communication error. And the communication error happens possibly because of the missing device resume dependency -- e.g. the HD-audio is resumed while or before the Nvidia driver gets resumed. We have device-link chain for Intel codecs via audio component (and will likely have for radeon/amdgpu/nouveau, too), but missing for Nvidia binary. For avoiding to switch to single_cmd mode, you can pass single_cmd=0 option to snd-hda-intel module. Then, even if the communication error happens, it won't change to single_cmd mode, so once after the Nvidia driver resumes, it'd start working again. I see. And sequencing that resume in the nvidia binary case is going to be really painful: https://download.nvidia.com/XFree86/gpu-hdmi-audio-document/#_driver_architecture > Note that the NVIDIA binary X driver is specifically an X driver. For this > reason, steps 2 and 3 (and indeed 1) are only activated when the X server is > running, and actively controls the VT. When X is not active, or when the > console is VT-switched to a text terminal, HDMI audio will not work. nvidia does chvt to text console on suspend, and then chvt back to X on resume. After chvt back to X, nvidia will then resume and only at that late point restore the availability of gfx and audio stuff... |
Created attachment 283763 [details] dmesg log We have an Acer Aspire TC-865 desktop equipped with Intel i7-8700 and NVIDIA GeForce GTX 1050. The HDMI cable is plugged to the NVIDIA card and a display with builtin speakers directly. Tested with kernel 5.2. The HDMI audio works correctly before suspend. Pin#5 holds the ELD. [ 26.504190] snd_hda_codec_hdmi hdaudioC1D0: HDMI hot plug event: Codec=0 Pin=5 Device=0 Inactive=0 Presence_Detect=1 ELD_Valid=1 [ 26.507811] snd_hda_codec_hdmi hdaudioC1D0: HDMI status: Codec=0 Pin=5 Presence_Detect=1 ELD_Valid=1 [ 26.892083] snd_hda_codec_hdmi hdaudioC1D0: HDMI: detected monitor ASUS VP247 at connection type HDMI The HDMI audio may become failed after resume. Pin#5 does not hold ELD any more. It changes to Pin#4. [ 369.300562] snd_hda_intel 0000:01:00.1: azx_get_response timeout, polling the codec once: last cmd=0x005f0900 [ 370.304539] snd_hda_intel 0000:01:00.1: azx_get_response timeout, switching to polling mode: last cmd=0x005f0900 [ 371.308512] snd_hda_intel 0000:01:00.1: azx_get_response timeout, switching to single_cmd mode: last cmd=0x005f0900 [ 371.308526] snd_hda_codec_hdmi hdaudioC1D0: HDMI status: Codec=0 Pin=5 Presence_Detect=1 ELD_Valid=1 [ 371.308670] snd_hda_intel 0000:01:00.1: get_response timeout: IRS=0x0 [ 371.308673] snd_hda_codec_hdmi hdaudioC1D0: HDMI: invalid ELD buf size -1 [ 371.404592] snd_hda_intel 0000:01:00.1: Clearing TCSEL [ 371.404610] snd_hda_intel 0000:01:00.1: Setting Nvidia snoop: 1 [ 371.407882] snd_hda_codec_hdmi hdaudioC1D0: generic_hdmi_resume [ 371.408380] snd_hda_codec_hdmi hdaudioC1D0: HDMI status: Codec=0 Pin=4 Presence_Detect=1 ELD_Valid=1 [ 371.412402] snd_hda_codec_hdmi hdaudioC1D0: HDMI: detected monitor ASUS VP247 at connection type HDMI