| Summary: | HDMI detection fails, i915 Intel HD400 | ||
|---|---|---|---|
| Product: | DRI | Reporter: | Pablo <pablodebiase> |
| Component: | DRM/Intel | Assignee: | Intel GFX Bugs mailing list <intel-gfx-bugs> |
| Status: | CLOSED FIXED | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> |
| Severity: | normal | ||
| Priority: | medium | CC: | intel-gfx-bugs |
| Version: | unspecified | ||
| Hardware: | x86-64 (AMD64) | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | |||
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Description
Pablo
2017-10-26 16:52:19 UTC
Created attachment 135076 [details]
After plugging in the HDMI cable: dmesg with drm.debug=0x1e log_buf_len=1M lines that were added after the previous one.
get-edid shows that the bus is detected and the monitor as well. This is read-edid version 3.0.2. Prepare for some fun. Attempting to use i2c interface No EDID on bus 0 No EDID on bus 1 No EDID on bus 2 No EDID on bus 4 No EDID on bus 5 No EDID on bus 6 No EDID on bus 8 3 potential busses found: 3 7 9 Will scan through until the first EDID is found. Pass a bus number as an option to this program to go only for that one. 256-byte EDID successfully retrieved from i2c bus 3 Looks like i2c was successful. Have a good day. 63F04310019 BenQ GL2450H However, xrandr -q shows that the monitor is not connected: Screen 0: minimum 8 x 8, current 1024 x 768, maximum 32767 x 32767 eDP1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 518mm x 333mm 1024x768 59.87*+ 800x600 60.32 56.25 640x480 59.94 512x384 60.00 DP1 disconnected (normal left inverted right x axis y axis) DP2 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis) I suspect this might be fixed by ea850f64c272 ("drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel")
Can you try again with a more recent kernel? Looks like 4.14-rc5 has that, as does 4.13.8 and 4.9.57. Other stable kernel might have it as well, but I didn't bother to check that far.
If that doesn't help, then please attach a copy of /sys/kernel/debug/dri/0/i915_opregion
Oh and since you found something with get-edid on i2c bus 3, can you also check what /sys/class/i2c-adapter/i2c-3/name says? Pls make sure get-edid is still reporting the success for bus 3, just in case the bus numbers got shuffled around.
It works the first time when I connect a VGA cable but if I disconnect it and reconnect again it stops working. Bug reported too: https://bugs.freedesktop.org/show_bug.cgi?id=103472 This is the output of # i2cdetect -l i2c-0 i2c i915 gmbus ssc I2C adapter i2c-1 i2c i915 gmbus vga I2C adapter i2c-2 i2c i915 gmbus panel I2C adapter i2c-3 i2c i915 gmbus dpc I2C adapter i2c-4 i2c i915 gmbus dpb I2C adapter i2c-5 i2c i915 gmbus dpd I2C adapter i2c-6 i2c DPDDC-B I2C adapter i2c-7 i2c DPDDC-C I2C adapter i2c-8 i2c DPDDC-D I2C adapter i2c-9 smbus SMBus iManager adapter SMBus adapter (In reply to Ville Syrjala from comment #4) > I suspect this might be fixed by ea850f64c272 ("drm/i915/bios: parse DDI > ports also for CHV for HDMI DDC pin and DP AUX channel") > > Can you try again with a more recent kernel? Looks like 4.14-rc5 has that, > as does 4.13.8 and 4.9.57. Other stable kernel might have it as well, but I > didn't bother to check that far. > > If that doesn't help, then please attach a copy of > /sys/kernel/debug/dri/0/i915_opregion > > Oh and since you found something with get-edid on i2c bus 3, can you also > check what /sys/class/i2c-adapter/i2c-3/name says? Pls make sure get-edid is > still reporting the success for bus 3, just in case the bus numbers got > shuffled around. I tested it with Ubuntu 17.10 that has a 4.13.0 kernel and still does not work but I will try the kernels you mention but unfortunately it will take me more time since they are not in Ubuntu 16.04 repository. i2c-3 name is "i915 gmbus dpc" coincidentally to what i2cdetect said in my previous comment: "i2c-3 i2c i915 gmbus dpc I2C adapter" I am attaching i915_opregion in the next comment. Created attachment 135088 [details]
cat /sys/kernel/debug/dri/0/i915_opregion
(In reply to Pablo from comment #7) > Created attachment 135088 [details] > cat /sys/kernel/debug/dri/0/i915_opregion EFP device info: Device handle: 0x0040 (EFP 2 (HDMI/DVI/DP)) ... Port: 0x03 (HDMI-D) AIM I2C pin: 0x00 AIM Slave address: 0x00 DDC pin: 0x04 "i2c-3 i2c i915 gmbus dpc I2C adapter" Those two pieces of information do suggest that the commit in question should in fact fix this. (In reply to Ville Syrjala from comment #8) > (In reply to Pablo from comment #7) > > Created attachment 135088 [details] > > cat /sys/kernel/debug/dri/0/i915_opregion > > EFP device info: > Device handle: 0x0040 (EFP 2 (HDMI/DVI/DP)) > ... > Port: 0x03 (HDMI-D) > AIM I2C pin: 0x00 > AIM Slave address: 0x00 > DDC pin: 0x04 > > "i2c-3 i2c i915 gmbus dpc I2C adapter" > > Those two pieces of information do suggest that the commit in question > should in fact fix this. Kernel 4.13.8 fixed the issue! Thanks! Do you know if there is patch for Kernel 4.4.0-97 that I could apply using dkms? (In reply to Pablo from comment #9) > (In reply to Ville Syrjala from comment #8) > > (In reply to Pablo from comment #7) > > > Created attachment 135088 [details] > > > cat /sys/kernel/debug/dri/0/i915_opregion > > > > EFP device info: > > Device handle: 0x0040 (EFP 2 (HDMI/DVI/DP)) > > ... > > Port: 0x03 (HDMI-D) > > AIM I2C pin: 0x00 > > AIM Slave address: 0x00 > > DDC pin: 0x04 > > > > "i2c-3 i2c i915 gmbus dpc I2C adapter" > > > > Those two pieces of information do suggest that the commit in question > > should in fact fix this. > > Kernel 4.13.8 fixed the issue! Thanks! Do you know if there is patch for > Kernel 4.4.0-97 that I could apply using dkms? No idea about ubuntu kernels. Presumably they will still provide stable kernel updates, and the patch should eventually percolate down to all stable kernels (I hope). Anyways, thanks for reporting the issue and testing the fix. Marking the bug as fixed: commit ea850f64c2722278f150dc11de2141baeb24211c (tag: drm-intel-fixes-2017-10-11) Author: Jani Nikula <jani.nikula@intel.com> Date: Thu Sep 28 11:21:57 2017 +0300 drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel |
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