Public bug reported: The HiSilicon D05 board has some PCI bridges (PCI ID 19e5:1610) that are not spec-compliant: they do not set the VGA Enable bit when a VGA card is behind the bridge. This breaks Xorg auto-detection. [0]
Despite this, the hibmc VGA card (PCI ID 19e5:1711) is known to work when behind these bridges. Provide a quirk so that this combination of bridge and card works. I will upstream this and then begin the process of back-porting. [0] https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1691991 - this bug tracked debugging of a segfault and then this issue. Comments 25 (https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1691991/comments/25) and 31 onwards detail this issue. ** Affects: linux (Ubuntu) Importance: Undecided Status: In Progress ** Attachment added: "0001-HiSilicon-Hibmc-vgaarb-fixup-arm64-fixup.patch" https://bugs.launchpad.net/bugs/1698706/+attachment/4898283/+files/0001-HiSilicon-Hibmc-vgaarb-fixup-arm64-fixup.patch -- 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/1698706 Title: Quirk for non-compliant PCI bridge on HiSilicon D05 board Status in linux package in Ubuntu: In Progress Bug description: The HiSilicon D05 board has some PCI bridges (PCI ID 19e5:1610) that are not spec-compliant: they do not set the VGA Enable bit when a VGA card is behind the bridge. This breaks Xorg auto-detection. [0] Despite this, the hibmc VGA card (PCI ID 19e5:1711) is known to work when behind these bridges. Provide a quirk so that this combination of bridge and card works. I will upstream this and then begin the process of back-porting. [0] https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1691991 - this bug tracked debugging of a segfault and then this issue. Comments 25 (https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1691991/comments/25) and 31 onwards detail this issue. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1698706/+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
