You have been subscribed to a public bug: My HP LP2475W monitor reports incorrect EDID info resulting in bad image quality.
It can be fixed with a customized edid file, and adding drm.edid_firmware kernel boot parameter. But in Ubuntu 18.04.1 and Ubuntu 18.10, if crypsetup-initramfs package is installed, it fails to load the firmware file. Detailed bug report: Following this istructions (https://blog.tingping.se/2018/12/01/amdgpu- fullrgb.html), I created a modified edid.bin file in /lib/firmware/edid/edid.bin and passed drm.edid_firmware=edid/edid.bin to the kernel at boot. In my daily Ubuntu 18.04.1 dmesg report this error and I could not solve it. [ 1.173897] platform HDMI-A-1: Direct firmware load for edid/edid.bin failed with error -2 So I tried in a fresh Ubuntu 18.10 and it worked nicely, no error and nice crisp display image. But when I began to install the software I need for daily use it ceased to work and began to show the same message as in my work Ubuntu 18.04.1. After some test it seems that the problem occurs after I install cryptsetup: ------ dmesg | grep edid [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.18.0-14-generic root=UUID=dfb5fdf3-b93b-4abf-99fd-d5a7ec4e66df ro drm.edid_firmware=edid/edid.bin quiet splash vt.handoff=1 [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.18.0-14-generic root=UUID=dfb5fdf3-b93b-4abf-99fd-d5a7ec4e66df ro drm.edid_firmware=edid/edid.bin quiet splash vt.handoff=1 [ 3.792846] [drm] Got external EDID base block and 1 extension from "edid/edid.bin" for connector "HDMI-A-1" ------ I purged cryptsetup but the problem persisted, so I removed too cryptsetup-initramfs and the the problem disapeared and the edid file is loaded again, improving the display quality: ------ dmesg | grep edid [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.18.0-14-generic root=UUID=dfb5fdf3-b93b-4abf-99fd-d5a7ec4e66df ro drm.edid_firmware=edid/edid.bin quiet splash vt.handoff=1 [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.18.0-14-generic root=UUID=dfb5fdf3-b93b-4abf-99fd-d5a7ec4e66df ro drm.edid_firmware=edid/edid.bin quiet splash vt.handoff=1 [ 3.717878] [drm] Got external EDID base block and 1 extension from "edid/edid.bin" for connector "HDMI-A-1" ------- This question in AskUbuntu suggest that there are more people with this probem (https://askubuntu.com/questions/1113195/how-to-output-full- range-rgb-in-ubuntu-18-04-1) ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: linux-image-4.18.0-14-generic 4.18.0-14.15 ProcVersionSignature: Ubuntu 4.18.0-14.15-generic 4.18.20 Uname: Linux 4.18.0-14-generic x86_64 ApportVersion: 2.20.10-0ubuntu13.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: david 2007 F.... pulseaudio /dev/snd/pcmC0D1p: david 2007 F...m pulseaudio /dev/snd/controlC1: david 2007 F.... pulseaudio Date: Wed Feb 6 18:37:39 2019 InstallationDate: Installed on 2019-02-06 (0 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) IwConfig: lo no wireless extensions. enp7s0 no wireless extensions. MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M. ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=es_ES.UTF-8 SHELL=/bin/bash ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-14-generic root=UUID=dfb5fdf3-b93b-4abf-99fd-d5a7ec4e66df ro drm.edid_firmware=edid/edid.bin quiet splash vt.handoff=1 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.18.0-14-generic N/A linux-backports-modules-4.18.0-14-generic N/A linux-firmware 1.175.1 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/11/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: U1n dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z68X-UD3H-B3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: To be filled by O.E.M. dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrU1n:bd07/11/2016:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ68X-UD3H-B3:rvrTobefilledbyO.E.M.:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To be filled by O.E.M. dmi.product.name: To be filled by O.E.M. dmi.product.sku: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. ** Affects: initramfs-tools (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: amd64 apport-bug bjf-tracking cosmic -- drm.edid_firmware fails to load firmware where crypsetup-initramfs is installed https://bugs.launchpad.net/bugs/1814938 You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu. -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
