Public bug reported: [Impact] The ASPEED DisplayPort driver rejects EDID block 1, limiting EDID reads to 128 bytes. DisplayPort supports up to 256 bytes of EDID data (blocks 0 and 1), so monitors that provide extended EDID information in block 1 will have that data silently ignored, potentially leading to incorrect mode detection or display configuration.
[Fix] Allow the ASPEED DP driver to fetch EDID blocks 0 and 1 by changing the block limit check from > 0 to > 1 in ast_astdp_read_edid_block(). Upstream fix: https://patchwork.freedesktop.org/patch/747259/ NV PR: <to be added> ** Affects: linux-nvidia-7.0 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux-nvidia-7.0 (Ubuntu) Importance: Undecided Status: New ** No longer affects: linux-nvidia (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2166545 Title: drm/ast: DisplayPort edid supports 256 bytes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-nvidia-7.0/+bug/2166545/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
