See bug 1357383#c9 . Fairly recent high-end Dell Precision 7710 (latest BIOS 1.8.3 10/2016) : - LCD : 17.3" UHD 3840x2160 - IGP : Intel Xeon E3-1545M (Intel Iris Pro P580) - DGP : AMD FirePro W7170M (Radeon R9 285) , GCN 1.2 WRT https://fedoraproject.org/wiki/Test_Day:2016-10-26_BetterSwitchableGraphicsSupport , downloaded and ran Fedora-Workstation-Live-x86_64-25-20161026.n.0.iso (from https://www.happyassassin.net/nightlies.html). Experiencing the same issues as with almost every F24/kernel incantation : - With hybrid/switchable graphics enabled : the system almost always locks up hard (black screen, no caps lock or num lock, no Alt-SysRq) when trying to suspend or when the screen saver (DPMS ?) is started. This is with both i915 and amdgpu loaded (vgaswitcheroo), and with amdgpu blacklisted. - With hybrid/switchable graphics disabled in the BIOS : Screen locking usually works, suspending usually fails. Other info : * Tested with and without "dis_ucode_ldr" kernel parameter ; * Unfortunately, it seems I am unable to setup kernel logging via USB serial console ; * Willing to supply all kinds of info (ACPI dumps etc.), if instructed what & how.
Created attachment 1216555 [details] dmidecode
Created attachment 1216556 [details] dmesg
Created attachment 1216557 [details] lspci
Created attachment 1216558 [details] lsusb
Created attachment 1216559 [details] lsmod
Created attachment 1216573 [details] 4.9.0 i915 oops Running F24 with kernel 4.9.0-0.rc2.git2.1.fc26.x86_64 (as requested in bug #1357383) in hybrid graphics mode yields a reproducible kernel oops before locking up a few seconds later. The reproducible kernel oops is triggered by invoking "Blank screen" (Gnome > Settings > Power > Power Saving > Blank screen). The oops seems identical to the one reported on LKML (https://lkml.org/lkml/2016/10/12/119), and for which a patch seems availabl (https://bugs.freedesktop.org/show_bug.cgi?id=98214 : "drm/i915: WARN_ON_ONCE(!crtc_clock || cdclk < crtc_clock)"). This oops prevents any hybrid graphics testing on this machine. Any chance of integrating this patch in a Koji or COPR Fedora test kernel ?
ABRT data posted in bug 1391380.
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