Thanks.
Comment #36 shows the bug:
DP-2 connected 1600x900+1366+0 (0x95) normal (normal left inverted right
x axis y axis) 798mm x 334mm
Comment #34 does not show the bug:
[ 6.555] (II) modeset(0): Output DP-2 using initial mode 2560x1080
+1366+0
So I wonder if those are from different logins? Either way, when it's
using the wrong mode of 1600x900 it's also showing an EDID which decodes
nicely and includes 2560x1080:
---- Decoded from the EDID in comment #36 ----
EDID version: 1.4
Manufacturer: GSM Model 30485 Serial Number 297684
Made in week 2 of 2019
Digital display
10 bits per primary color channel
DisplayPort interface
Maximum image size: 80 cm x 34 cm
Gamma: 2.20
DPMS levels: Standby
Supported color formats: RGB 4:4:4, YCrCb 4:4:4, YCrCb 4:2:2
Default (sRGB) color space is primary color space
First detailed timing includes the native pixel format and preferred refresh
rate
Display is continuous frequency
Color Characteristics
Red: 0.6513, 0.3320
Green: 0.3066, 0.6308
Blue: 0.1503, 0.0595
White: 0.3134, 0.3291
Established Timings I & II
640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz (DMT)
640x480 75.000 Hz 4:3 37.500 kHz 31.500 MHz (DMT)
800x600 60.317 Hz 4:3 37.879 kHz 40.000 MHz (DMT)
800x600 75.000 Hz 4:3 46.875 kHz 49.500 MHz (DMT)
832x624 74.551 Hz 4:3 49.726 kHz 57.284 MHz (Apple)
1024x768 60.004 Hz 4:3 48.363 kHz 65.000 MHz (DMT)
1024x768 75.029 Hz 4:3 60.023 kHz 78.750 MHz (DMT)
1280x1024 75.025 Hz 5:4 79.976 kHz 135.000 MHz (DMT)
1152x870 75.062 Hz 192:145 68.681 kHz 100.000 MHz (Apple)
Standard Timings
1152x864 59.959 Hz 4:3 53.783 kHz 81.750 MHz (EDID 1.4 source: CVT)
1152x864 60.000 Hz 4:3 53.700 kHz 81.624 MHz (EDID 1.3 source: GTF)
1280x1024 60.020 Hz 5:4 63.981 kHz 108.000 MHz (DMT)
1280x720 60.000 Hz 16:9 45.000 kHz 74.250 MHz (DMT)
1600x900 60.000 Hz 16:9 60.000 kHz 108.000 MHz (DMT, RB)
1680x1050 59.954 Hz 16:10 65.290 kHz 146.250 MHz (DMT)
1920x1080 60.000 Hz 16:9 67.500 kHz 148.500 MHz (DMT)
1280x800 59.810 Hz 16:10 49.702 kHz 83.500 MHz (DMT)
1920x1080 74.906 Hz 16:9 84.643 kHz 220.750 MHz (EDID 1.4 source: CVT)
1920x1080 75.000 Hz 16:9 84.600 kHz 220.637 MHz (EDID 1.3 source: GTF)
Detailed mode: Clock 181.250 MHz, 798 mm x 334 mm
2560 2608 2640 2720 ( 48 32 80)
1080 1083 1093 1111 ( 3 10 18)
+hsync -vsync
VertFreq: 59.978 Hz, HorFreq: 66.636 kHz
Detailed mode: Clock 148.500 MHz, 798 mm x 334 mm
1920 2008 2052 2200 ( 88 44 148)
1080 1084 1089 1125 ( 4 5 36)
+hsync +vsync
VertFreq: 60.000 Hz, HorFreq: 67.500 kHz
Display Range Limits
Monitor ranges (Bare Limits): 40-75 Hz V, 90-90 kHz H, max dotclock 240 MHz
Display Product Name: LG HDR WFHD
Has 1 extension block
Checksum: 0x97
----------------
CTA-861 Extension Block Revision 3
Basic audio support
Supports YCbCr 4:4:4
Supports YCbCr 4:2:2
1 native detailed modes
26 bytes of CTA data blocks
Audio Data Block
Linear PCM, max channels 2
Supported sample rates (kHz): 48 44.1 32
Supported sample sizes (bits): 24 20 16
Video Data Block
1920x1080 60.000 Hz 16:9 67.500 kHz 148.500 MHz (VIC 16)
1280x720 60.000 Hz 16:9 45.000 kHz 74.250 MHz (VIC 4)
720x480 59.940 Hz 16:9 31.469 kHz 27.000 MHz (VIC 3)
640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz (VIC 1)
1920x1080 50.000 Hz 16:9 56.250 kHz 148.500 MHz (VIC 31)
1280x720 50.000 Hz 16:9 37.500 kHz 74.250 MHz (VIC 19)
2560x1080 50.000 Hz 64:27 56.250 kHz 185.625 MHz (VIC 89)
4096x2160 100.000 Hz 256:135 225.000 kHz 1188.000 MHz (VIC 218)
720x576 50.000 Hz 16:9 31.250 kHz 27.000 MHz (VIC 18)
Speaker Allocation Data Block
Speaker map:
FL/FR - Front Left/Right
Extended tag: Colorimetry Data Block
BT2020YCC
BT2020RGB
Extended tag: HDR Static Metadata Data Block
Electro optical transfer functions:
Traditional gamma - SDR luminance range
SMPTE ST2084
Supported static metadata descriptors:
Static metadata type 1
Detailed mode: Clock 27.000 MHz, 798 mm x 334 mm
720 736 798 858 ( 16 62 60)
480 489 495 525 ( 9 6 30)
-hsync -vsync
VertFreq: 59.940 Hz, HorFreq: 31.469 kHz
Detailed mode: Clock 228.250 MHz, 798 mm x 334 mm
2560 2608 2640 2720 ( 48 32 80)
1080 1083 1093 1119 ( 3 10 26)
+hsync -vsync
VertFreq: 74.991 Hz, HorFreq: 83.915 kHz
Checksum: 0xd7
** Summary changed:
- Secondary monitor unpredictable behavior at boot (Ivy Bridge, DisplayPort)
+ Modesetting randomly fails to offer modes available in the EDID (CTA-861
Extension Block Revision 3)
** Changed in: xorg-server (Ubuntu)
Status: Incomplete => Triaged
** Changed in: xorg-server (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1859071
Title:
Modesetting randomly fails to offer all modes available in the EDID
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