[Bug 1890772] Re: Some external 4K monitor is not working properly
reply #30, Agree, I think we should add GUI option for user to set it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
Yeah the world is full of subtle connection problems. In this particular case, dropping back to 8bpc would fix it. But I'm not sure how we would detect that automatically, or if it's even the right thing to do in most cases. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
I guess Windows is good at compatibility and defaulting to 8bpc is safe. But unless we have a GUI that allows users to then select 10bpc, defaulting to 8bpc is not something we should do. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
Yeah the world is full of subtle connection problems. In this particular case, dropping back to 8bps would fix it. But I'm not sure how we would detect that, or if it's even the right thing to do in most cases. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
Regaring comment #26, I am using PX UH-1.2MX HDMI 2.0 certified Premium High Speed cable so the cable's quality should not be a problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
My monitor is EDID 1.3 and it has the same problem. edid-decode (hex): 00 ff ff ff ff ff ff 00 41 0c 8f c1 bd 07 00 00 08 1d 01 03 80 3c 22 78 2a 67 a1 a5 55 4d a2 27 0e 50 54 bf ef 00 d1 c0 b3 00 95 00 81 80 81 40 81 c0 01 01 01 01 4d d0 00 a0 f0 70 3e 80 30 20 35 00 55 50 21 00 00 1a a3 66 00 a0 f0 70 1f 80 30 20 35 00 55 50 21 00 00 1a 00 00 00 fc 00 50 48 4c 20 32 37 36 45 38 56 0a 20 20 00 00 00 fd 00 17 50 1e a0 3c 00 0a 20 20 20 20 20 20 01 72 02 03 33 f1 4c 90 04 03 1f 13 01 12 5d 5e 5f 60 61 23 09 07 07 83 01 00 00 6d 03 0c 00 10 00 38 78 20 00 60 01 02 03 67 d8 5d c4 01 78 80 03 e3 0f 00 0c 56 5e 00 a0 a0 a0 29 50 30 20 35 00 55 50 21 00 00 1e 02 3a 80 18 71 38 2d 40 58 2c 45 00 55 50 21 00 00 1e 01 1d 00 72 51 d0 1e 20 6e 28 55 00 55 50 21 00 00 1e 4d 6c 80 a0 70 70 3e 80 30 20 3a 00 55 50 21 00 00 1a 00 00 00 00 4e EDID version: 1.3 Manufacturer: PHL Model 49551 Serial Number 1981 Made in week 8 of 2019 Digital display Maximum image size: 60 cm x 34 cm Gamma: 2.20 DPMS levels: Off RGB color display First detailed timing is preferred timing Color Characteristics Red: 0.6455, 0.3339 Green: 0.3017, 0.6357 Blue: 0.1542, 0.0566 White: 0.3125, 0.3291 Established Timings I & II 720x40070.082 Hz 9:531.467 kHz 28.320 MHz (IBM) 640x48059.940 Hz 4:331.469 kHz 25.175 MHz (DMT) 640x48066.667 Hz 4:335.000 kHz 30.240 MHz (Apple) 640x48072.809 Hz 4:337.861 kHz 31.500 MHz (DMT) 640x48075.000 Hz 4:337.500 kHz 31.500 MHz (DMT) 800x60056.250 Hz 4:335.156 kHz 36.000 MHz (DMT) 800x60060.317 Hz 4:337.879 kHz 40.000 MHz (DMT) 800x60072.188 Hz 4:348.077 kHz 50.000 MHz (DMT) 800x60075.000 Hz 4:346.875 kHz 49.500 MHz (DMT) 832x62474.551 Hz 4:349.726 kHz 57.284 MHz (Apple) 1024x76860.004 Hz 4:348.363 kHz 65.000 MHz (DMT) 1024x76870.069 Hz 4:356.476 kHz 75.000 MHz (DMT) 1024x76875.029 Hz 4:360.023 kHz 78.750 MHz (DMT) 1280x1024 75.025 Hz 5:479.976 kHz 135.000 MHz (DMT) Standard Timings 1920x1080 60.000 Hz 16:967.500 kHz 148.500 MHz (DMT) 1680x1050 59.954 Hz 16:10 65.290 kHz 146.250 MHz (DMT) 1440x90059.887 Hz 16:10 55.935 kHz 106.500 MHz (DMT) 1280x1024 60.020 Hz 5:463.981 kHz 108.000 MHz (DMT) 1280x96060.000 Hz 4:360.000 kHz 108.000 MHz (DMT) 1280x72060.000 Hz 16:945.000 kHz 74.250 MHz (DMT) Detailed mode: Clock 533.250 MHz, 597 mm x 336 mm 3840 3888 3920 4000 ( 48 32 80) 2160 2163 2168 ( 3 5 54) +hsync -vsync VertFreq: 59.997 Hz, HorFreq: 133.312 kHz Detailed mode: Clock 262.750 MHz, 597 mm x 336 mm 3840 3888 3920 4000 ( 48 32 80) 2160 2163 2168 2191 ( 3 5 23) +hsync -vsync VertFreq: 29.981 Hz, HorFreq: 65.688 kHz Display Product Name: PHL 276E8V Display Range Limits Monitor ranges (GTF): 23-80 Hz V, 30-160 kHz H, max dotclock 600 MHz Has 1 extension block Checksum: 0x72 CTA-861 Extension Block Revision 3 Underscans PC formats by default Basic audio support Supports YCbCr 4:4:4 Supports YCbCr 4:2:2 1 native detailed modes 47 bytes of CTA data blocks Video Data Block 1920x1080 60.000 Hz 16:967.500 kHz 148.500 MHz (VIC 16, native) 1280x72060.000 Hz 16:945.000 kHz 74.250 MHz (VIC 4) 720x48059.940 Hz 16:931.469 kHz 27.000 MHz (VIC 3) 1920x1080 50.000 Hz 16:956.250 kHz 148.500 MHz (VIC 31) 1280x72050.000 Hz 16:937.500 kHz 74.250 MHz (VIC 19) 640x48059.940 Hz 4:331.469 kHz 25.175 MHz (VIC 1) 720x57650.000 Hz 16:931.250 kHz 27.000 MHz (VIC 18) 3840x2160 24.000 Hz 16:954.000 kHz 297.000 MHz (VIC 93) 3840x2160 25.000 Hz 16:956.250 kHz 297.000 MHz (VIC 94) 3840x2160 30.000 Hz 16:967.500 kHz 297.000 MHz (VIC 95) 3840x2160 50.000 Hz 16:9 112.500 kHz 594.000 MHz (VIC 96) 3840x2160 60.000 Hz 16:9 135.000 kHz 594.000 MHz (VIC 97) Audio Data Block Linear PCM, max channels 2 Supported sample rates (kHz): 48 44.1 32 Supported sample sizes (bits): 24 20 16 Speaker Allocation Data Block Speaker map: FL/FR - Front Left/Right Vendor-Specific Data Block, OUI 0x000c03 (HDMI) Source physical address 1.0.0.0 DC_36bit DC_30bit DC_Y444 Maximum TMDS clock: 600 MHz Extended HDMI video details: HDMI VICs: 3840x2160 30.000 Hz 16:967.500 kHz 297.000 MHz (HDMI VIC 1) 3840x2160 25.000 Hz 16:956.250 kHz 297.000 MHz (HDMI VIC 2) 3840x2160 24.000 Hz 16:954.000 kHz 297.000 MHz (HDMI VIC 3) Vendor-Specific Data Block, OUI 0xc45dd8 (HDMI Forum) Version: 1 Maximum TMDS Character Rate: 600 MHz SCDC Pres
[Bug 1890772] Re: Some external 4K monitor is not working properly
Thanks that does seem to be an old EDID v1.3 with no defined bit depth. But there are some vendor-specific blocks there that do advertise support for 10bpc and 12bpc. In this case I think it's correct to try and default to 10bpc or 12bpc. It's probably only the cable or dongle letting it down. I wonder if such limited cable bandwidth is something we can detect in software?... Imagine (or please test) what a newer monitor with an EDID v1.4 would do. If that reported more definite support for 10bpc then it would be even more correct to try and default to 10bpc. But we would also need more intelligent logic (somewhere) that detects when the desired bandwidth isn't being achieved due to cable or dongle problems. ** Changed in: xorg-server (Ubuntu) Importance: Undecided => Medium ** Changed in: xorg-server (Ubuntu) Status: Incomplete => Triaged ** Changed in: oem-priority Status: Incomplete => New ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Also affects: mutter (Ubuntu) Importance: Undecided Status: New ** Changed in: mutter (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
Upload the problem edid. ** Attachment added: "edid of the display with problem" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1890772/+attachment/5399493/+files/edid-problem -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
I forgot a display signal doesn't include any alpha channel, so yeah 8 bpc will require less bandwidth than 10 bpc. The maximum capability of the monitor should be advertised in its EDID. At least modern monitors do. You can check it using the 'edid-decode' command and grepping for 'bits per primary'. What gets returned? Can you share the EDID of the troublesome display? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
** Description changed: The bug is originated from, https://bugs.launchpad.net/somerville/+bug/1887915/ https://bugs.launchpad.net/somerville/+bug/1886778 It has some problem when user connect to external 4K monitor with refresh rate 60. The problem can be solved by lower the bpc, or lower the refresh rate. `xrandr --output DP-3 --set "max bpc" 8` Would like to open this bug to open discussion for enhancing user experience. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.4 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompositorRunning: None CurrentDesktop: ubuntu:GNOME DistUpgraded: Fresh install DistributionChannelDescriptor: # This is the distribution channel descriptor for the OEM CDs # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-focal-amd64-20200502-85+fossa-samwell-tgl+X42 DistroCodename: focal DistroRelease: Ubuntu 20.04 DistroVariant: ubuntu DkmsStatus: nvidia, 440.100, 5.6.0-1021-oem, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Device [8086:9a49] (rev 01) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:09fc] Subsystem: Dell GP107M [GeForce MX350] [1028:09fc] InstallationDate: Installed on 2020-08-07 (0 days ago) InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary 20200502-05:58 - MachineType: Dell Inc. Vostro 5301 Package: xorg 1:7.7+19ubuntu14 [origin: unknown] PackageArchitecture: amd64 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.6.0-1021-oem root=UUID=41be2253-410a-4ef7-a096-4193a58efdbd ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.6.0-1021.21-oem 5.6.19 Tags: third-party-packages focal ubuntu Uname: Linux 5.6.0-1021-oem x86_64 UnreportableReason: This is not an official Ubuntu package. Please remove any third party package and try again. UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.101-2 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
reply #20 yes, Daniel. Originally, the display would like to use 10 bpc. but it is failed with some dongle. However, we found that, it uses 8bit color depth on Windows. We wonder if Windows has done some magic for enhancing compatibilty. Maybe we can also discuss if we can have some implementation like export the bpc selection to gnome-control-center for user. Otherwise, user can just found that it works on Windows but failed on Ubuntu. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
Note also that if you did have a machine that required: xrandr --output DP-3 --set "max bpc" 8 on a 4K 60Hz display then that may indicate a bandwidth problem. Maybe a limitation of the cable. Does a max bpc of 10 also work? What values don't work? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
There doesn't seem to be any external monitor connected to this machine, or any 'DP-3' connector. Please attach 'xrandr --verbose' info with a monitor connected showing the problem, or please open a new bug from the affected machine. ** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu) ** Changed in: xorg-server (Ubuntu) Status: New => Incomplete ** Changed in: oem-priority Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
** Also affects: oem-priority Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890772] Re: Some external 4K monitor is not working properly
apport information ** Tags added: apport-collected focal third-party-packages ubuntu ** Description changed: The bug is originated from, https://bugs.launchpad.net/somerville/+bug/1887915/ https://bugs.launchpad.net/somerville/+bug/1886778 It has some problem when user connect to external 4K monitor with refresh rate 60. The problem can be solved by lower the bpc, or lower the refresh rate. `xrandr --output DP-3 --set "max bpc" 8` - Would like to open this bug to open discussion for enhancing user - experience. + Would like to open this bug to open discussion for enhancing user experience. + --- + ProblemType: Bug + ApportVersion: 2.20.11-0ubuntu27.4 + Architecture: amd64 + BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' + CasperMD5CheckResult: skip + CompositorRunning: None + CurrentDesktop: ubuntu:GNOME + DistUpgraded: Fresh install + DistributionChannelDescriptor: + # This is the distribution channel descriptor for the OEM CDs + # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor + canonical-oem-somerville-focal-amd64-20200502-85+fossa-samwell-tgl+X42 + DistroCodename: focal + DistroRelease: Ubuntu 20.04 + DistroVariant: ubuntu + DkmsStatus: nvidia, 440.100, 5.6.0-1021-oem, x86_64: installed + ExtraDebuggingInterest: Yes + GraphicsCard: + Intel Corporation Device [8086:9a49] (rev 01) (prog-if 00 [VGA controller]) +Subsystem: Dell Device [1028:09fc] +Subsystem: Dell GP107M [GeForce MX350] [1028:09fc] + InstallationDate: Installed on 2020-08-07 (0 days ago) + InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary 20200502-05:58 + MachineType: Dell Inc. Vostro 5301 + Package: xorg 1:7.7+19ubuntu14 [origin: unknown] + PackageArchitecture: amd64 + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.6.0-1021-oem root=UUID=41be2253-410a-4ef7-a096-4193a58efdbd ro quiet splash vt.handoff=7 + ProcVersionSignature: Ubuntu 5.6.0-1021.21-oem 5.6.19 + Tags: third-party-packages focal ubuntu + Uname: Linux 5.6.0-1021-oem x86_64 + UnreportableReason: This is not an official Ubuntu package. Please remove any third party package and try again. + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo + _MarkForUpload: True + dmi.bios.date: 08/03/2020 + dmi.bios.vendor: Dell Inc. + dmi.bios.version: 0.6.0 + dmi.board.vendor: Dell Inc. + dmi.chassis.type: 10 + dmi.chassis.vendor: Dell Inc. + dmi.modalias: dmi:bvnDellInc.:bvr0.6.0:bd08/03/2020:svnDellInc.:pnVostro5301:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct10:cvr: + dmi.product.family: Vostro + dmi.product.name: Vostro 5301 + dmi.product.sku: 09FC + dmi.sys.vendor: Dell Inc. + version.compiz: compiz N/A + version.libdrm2: libdrm2 2.4.101-2 + version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1 + version.libgl1-mesa-glx: libgl1-mesa-glx N/A + version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.2 + version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A + version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 + version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1 + version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 ** Attachment added: "CurrentDmesg.txt" https://bugs.launchpad.net/bugs/1890772/+attachment/5399471/+files/CurrentDmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890772 Title: Some external 4K monitor is not working properly To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1890772/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
