Hi, It is more than 6 monthes I suffer from an unknown bug which seemed to be a DRM or otherwise graphical bug affecting Linux 4.6-rcX on x86_64 platform. (unable to test on 32-bit platform) For some unclear reason my AMD/ATI Radeon TURKS video card was not initialized properly by those newer kernel versions. I investigated hardly and found a "shallow" bug introduced by a commit pair (sic.) : cfeb8139a1fbbbae3f1e986133f4e9e7833eeac4 Merge branch 'pci/host-hv' into next and 30b5b8808c12bcd947dd474980482561b69c1bcb PCI: Restore inclusion of pci/hotplug Kconfig I bet though this bug was hiding another real "deeper" bug, which proved right. Here follows my findings : In the end, I found that the real first bad commit for the bug we are talking about is : [0c0e0736acad4e76e718456c75d78ad95eea0011] PCI: Set ROM shadow location in arch code, not in PCI core I already opened a ticket for this as bug #175391 on bugzilla.kernel.org ( https://bugzilla.kernel.org/show_bug.cgi?id=175391 ) and advise you to read it in its entirety. Since I first suffered from it while using Ubuntu with "Mainline PPA Kernel", I also reported it as bug #1627496 on bugs.launchpad.net . ( https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1627496 ) Since I fed plenty of details on bugzilla, I won't copy/paste them here, obviously. Any comment or suggestion much appreciated. In hope this helps. Sincerely, Valentin QUEQUET -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
