Sorry, didn't see the request :-/ I just tried with 5.8 from HWE. After my frist reconnect, I got a
[350240.293152] failed hdr00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 (nothing else!) in dmesg, nothing about the external monitors in xrandr. At the second try (no restart), they work again. 3th try works, put spits a 350562.536195] i915 0000:00:02.0: DP-7: EDID is invalid: [350562.536197] [00] BAD 00 ff ff ff ff ff ff 00 ff ff ff ff ff ff ff ff [350562.536198] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [350562.536199] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [350562.536199] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [350562.536200] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [350562.536200] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [350562.536201] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [350562.536202] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1870786 Title: Kernel BUG sometimes during pluging in a DP Splitter Status in linux package in Ubuntu: Incomplete Bug description: Sometimes, during plugging in a DP -> 2x HDMI splitter, I get a kernel BUG with a NULL pointer dereference. Most times it works, through. I'm using Ubuntu 20.04 I've a 1920x1200 (eDP) display in my laptop, and a 2560x1440 and a 1920x1080 display on the splitter. Its a Intel(R) Core(TM) i5-8250U CPU platform. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu22 Architecture: amd64 DistroRelease: Ubuntu 20.04 HibernationDevice: RESUME=/dev/mapper/sda5_crypt MachineType: Default string Default string Package: linux-meta (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-21-generic root=UUID=df422beb-6d13-4575-9b30-ad00e25a7d35 ro noquiet nosplash ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.4.0-21-generic N/A linux-backports-modules-5.4.0-21-generic N/A linux-firmware 1.187 Tags: focal Uname: Linux 5.4.0-21-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: audio mythtv WpaSupplicantLog: _MarkForUpload: True dmi.bios.date: 01/11/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5.12 dmi.board.asset.tag: Default string dmi.board.name: Default string dmi.board.vendor: Default string dmi.board.version: Default string dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.12:bd01/11/2019:svnDefaultstring:pnDefaultstring:pvrDefaultstring:rvnDefaultstring:rnDefaultstring:rvrDefaultstring:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.family: Default string dmi.product.name: Default string dmi.product.sku: Default string dmi.product.version: Default string dmi.sys.vendor: Default string To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1870786/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
