DDC: Unexpected source address 0x00, should be 0x6e DDC: i2c_response_bytes: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 18 07 00 84 38 07 04 84 38 3f ff ff ff ff ff ff ff ff ff DDC: All zero response detected in ddc_i2c_write_read_raw DDC: Unexpected source address 0x00, should be 0x6e DDC: i2c_response_bytes: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 6e 6f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x00, should be 0x6e DDC: i2c_response_bytes: 00 00 64 00 64 64 51 7f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x00, should be 0x6e DDC: i2c_response_bytes: 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 00 28 DDC: Unexpected source address 0x00, should be 0x6e DDC: i2c_response_bytes: 00 00 00 00 00 68 7f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff fd 28 64 64 00 00 00 DDC: Unexpected source address 0x00, should be 0x6e DDC: i2c_response_bytes: 00 00 00 00 0f 00 00 00 00 5c d8 d8 00 00 00 00 00 00 00 7f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0xd5, should be 0x6e DDC: i2c_response_bytes: d5 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x0b, should be 0x6e DDC: i2c_response_bytes: 0b 00 07 04 17 00 27 00 37 00 47 00 03 00 3f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x64, should be 0x6e DDC: i2c_response_bytes: 64 77 74 07 80 7f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x97, should be 0x6e DDC: i2c_response_bytes: 97 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x03, should be 0x6e DDC: i2c_response_bytes: 03 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0xa4, should be 0x6e DDC: i2c_response_bytes: a4 7f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0xb4, should be 0x6e DDC: i2c_response_bytes: b4 01 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0xc7, should be 0x6e DDC: i2c_response_bytes: c7 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Display 1 I2C bus: /dev/i2c-4 DRM connector: card1-HDMI-A-1 /sys/class/drm/card1-HDMI-A-1/dpms On /sys/class/drm/card1-HDMI-A-1/enabled enabled /sys/class/drm/card1-HDMI-A-1/status connected Driver: i915 I2C address 0x50 (EDID) responsive: true I2C address 0x37 (DDC) responsive: true Is LVDS or EDP display: false Is laptop display by EDID: false Is laptop display: false /sys/bus/i2c/devices/i2c-4/name i915 gmbus dpb PCI device path: /sys/devices/pci0000:00/0000:00:02.0/i2c-4 EDID synopsis: Mfg id: SAM - Samsung Electric Company Model: C27F390 Product code: 3378 (0x0d32) Serial number: H4ZN804225 Binary serial number: 1113212234 (0x425a454a) Manufacture year: 2020, Week: 33 EDID version: 1.3 Extra descriptor: Video input definition: 0x80 - Digital Input Supported features: DPMS active-off Digital display type: RGB 4:4:4 + YCrCb 4:4:4 Standard sRGB color space: False White x,y: 0.313, 0.329 Red x,y: 0.646, 0.337 Green x,y: 0.328, 0.615 Blue x,y: 0.146, 0.056 Extension blocks: 1 EDID source: I2C EDID hex dump: +0 +4 +8 +c 0 4 8 c +0000 00 ff ff ff ff ff ff 00 4c 2d 32 0d 4a 45 5a 42 ........L-2.JEZB +0010 21 1e 01 03 80 3c 22 78 2a 52 95 a5 56 54 9d 25 !....<"x*R..VT.% +0020 0e 50 54 bb 8c 00 b3 00 81 c0 81 00 81 80 95 00 .PT............. +0030 a9 c0 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c .......:..q8-@X, +0040 45 00 56 50 21 00 00 1e 00 00 00 fd 00 32 48 1e E.VP!........2H. +0050 51 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 43 Q... .....C +0060 32 37 46 33 39 30 0a 20 20 20 20 20 00 00 00 ff 27F390. .... +0070 00 48 34 5a 4e 38 30 34 32 32 35 0a 20 20 01 c7 .H4ZN804225. .. VCP version: Detection failed DDC: Unexpected source address 0x03, should be 0x6e DDC: i2c_response_bytes: 03 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0xd4, should be 0x6e DDC: i2c_response_bytes: d4 7f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0xe7, should be 0x6e DDC: i2c_response_bytes: e7 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x01, should be 0x6e DDC: i2c_response_bytes: 01 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0xf4, should be 0x6e DDC: i2c_response_bytes: f4 00 00 00 01 7f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0xb0, should be 0x6e DDC: i2c_response_bytes: b0 00 00 75 50 3f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x00, should be 0x6e DDC: i2c_response_bytes: 00 00 00 03 52 50 00 00 16 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x07, should be 0x6e DDC: i2c_response_bytes: 07 27 37 47 57 67 67 87 87 a7 b7 c7 d7 e7 f7 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x03, should be 0x6e DDC: i2c_response_bytes: 03 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x57, should be 0x6e DDC: i2c_response_bytes: 57 27 47 67 97 b7 d7 e7 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 38 07 80 04 38 07 80 04 38 00 (get_controller_mfg_string_t) Freeing exception: Exception in function ddc_write_read_with_retry: status=DDCRC_RETRIES(-3007): maximum retries exceeded Caused by: Exception in function ddc_write_read: status=DDCRC_DDC_DATA(-3001): DDC data error Exception in function ddc_write_read: status=DDCRC_DDC_DATA(-3001): DDC data error Exception in function ddc_write_read: status=DDCRC_DDC_DATA(-3001): DDC data error Exception in function ddc_write_read: status=DDCRC_DDC_DATA(-3001): DDC data error Exception in function ddc_write_read: status=DDCRC_DDC_DATA(-3001): DDC data error Exception in function ddc_write_read: status=DDCRC_DDC_DATA(-3001): DDC data error Exception in function ddc_write_read: status=DDCRC_DDC_DATA(-3001): DDC data error Exception in function ddc_write_read: status=DDCRC_DDC_DATA(-3001): DDC data error Exception in function ddc_write_read: status=DDCRC_DDC_DATA(-3001): DDC data error Exception in function ddc_write_read: status=DDCRC_DDC_DATA(-3001): DDC data error Controller mfg: DDC communication failed DDC: All zero response detected in ddc_i2c_write_read_raw DDC: Unexpected source address 0x00, should be 0x6e DDC: i2c_response_bytes: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x6d, should be 0x6e DDC: i2c_response_bytes: 6d ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff DDC: Unexpected source address 0x00, should be 0x6e DDC: i2c_response_bytes: 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 00 28 Firmware version: 0.1 Monitor uses invalid feature flag in DDC reply packet to indicate unsupported feature. Current dynamic sleep adjustment multiplier: 2.00 Invalid display I2C bus: /dev/i2c-12 DRM connector: card1-eDP-1 /sys/class/drm/card1-eDP-1/dpms On /sys/class/drm/card1-eDP-1/enabled enabled /sys/class/drm/card1-eDP-1/status connected Driver: i915 I2C address 0x50 (EDID) responsive: true I2C address 0x37 (DDC) responsive: false Is LVDS or EDP display: true Is laptop display by EDID: false Is laptop display: true /sys/bus/i2c/devices/i2c-12/name AUX A/DDI A/PHY A PCI device path: /sys/devices/pci0000:00/0000:00:02.0/drm/card1/card1-eDP-1/i2c-12 EDID synopsis: Mfg id: BOE - BOE Model: Product code: 2242 (0x08c2) Serial number: Binary serial number: 0 (0x00000000) Manufacture year: 2019, Week: 1 EDID version: 1.4 Extra descriptor: NV156FHM-T07 Video input definition: 0xa5 - Digital Input (DisplayPort), Bit depth: 8 Supported features: Digital display type: RGB 4:4:4 Standard sRGB color space: False White x,y: 0.313, 0.329 Red x,y: 0.587, 0.367 Green x,y: 0.350, 0.584 Blue x,y: 0.164, 0.137 Extension blocks: 0 EDID source: I2C EDID hex dump: +0 +4 +8 +c 0 4 8 c +0000 00 ff ff ff ff ff ff 00 09 e5 c2 08 00 00 00 00 ................ +0010 01 1d 01 04 a5 22 13 78 03 4a 05 96 5e 59 95 2a .....".x.J..^Y.* +0020 23 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01 #PT............. +0030 01 01 01 01 01 01 c8 3a 80 18 71 38 3c 40 30 20 .......:..q8<@0 +0040 36 00 58 c2 10 00 00 1a 00 00 00 00 00 00 00 00 6.X............. +0050 00 00 00 00 00 00 00 00 00 1a 00 00 00 fe 00 42 ...............B +0060 4f 45 20 43 51 0a 20 20 20 20 20 20 00 00 00 fe OE CQ. .... +0070 00 4e 56 31 35 36 46 48 4d 2d 54 30 37 0a 00 a4 .NV156FHM-T07... This is a laptop display. Laptop displays do not support DDC/CI EXECUTION STATISTICS Maxtries Settings: Operation Type Current Default Min Max Write only exchange tries: 4 4 4 4 Write read exchange tries: 10 4 10 10 Multi-part read exchange tries: 8 4 8 8 Multi-part_write exchange tries: 8 4 8 8 Retry statistics for write only No tries attempted Retry statistics for write-read Max tries allowed: 10 Successful attempts by number of tries required: 1: 0 2: 0 3: 1 4: 1 5: 1 Total successful attempts: 3 Failed due to max tries exceeded: 2 Failed due to fatal error: 0 Total attempts: 5 Retry statistics for multi-part read No tries attempted Retry statistics for multi-part write No tries attempted DDC Related Errors: Count Status Code Description 27 DDCRC_DDC_DATA (-3001) DDC data error 2 DDCRC_READ_ALL_ZERO (-3006) packet contents entirely 0x00 2 DDCRC_RETRIES (-3007) maximum retries exceeded (derived) Total errors: 31 Errors Wrapped in Retry: Count Status Code Description 27 DDCRC_DDC_DATA (-3001) DDC data error 2 DDCRC_READ_ALL_ZERO (-3006) packet contents entirely 0x00 Total errors: 29 IO and Sleep Events: Total IO events: 139 IO error count: 31 Total sleep events: 64 Sleep Event type Count SE_WRITE_TO_READ 32 SE_POST_WRITE 0 SE_POST_READ 32 SE_POST_SAVE_SETTINGS 0 SE_PRE_MULTI_PART_READ 0 SE_POST_CAP_TABLE_SEGMENT 0 SE_SPECIAL 0 Call Stats: Type Count Millisec ( Nanosec) i2c writes using ioctl (I2_IOCTL_WRITE) 59 995 ( 995699386) i2c reads using ioctl (I2_IOCTL_READ) 46 634 ( 634739131) open file calls (IE_OPEN) 17 0 ( 175708) close file calls (IE_CLOSE) 17 0 ( 327144) Totals: 139 1630 ( 1630941369) Sleep Call Stats: Total sleep calls: 64 Requested sleep time milliseconds : 6400 Actual sleep milliseconds (nanosec): 6412 ( 6412714856) Total elapsed milliseconds (nanoseconds): 8099 ( 8099389832) Total non sleep system call time: 1630 milliseconds Total sleep call time: 6412 milliseconds Elapsed time: 8099 milliseconds