On 8 December 2014 at 10:34, Theodore Ts'o <tytso@xxxxxxx> wrote: > This is an update to a problem which I reported several months ago > (see below). The symptoms have changed a bit since then, but they've > stablized since 3.17 and 3.18-rcX, and while annoying, it's tolerable, > so I've been living with it. > > What I'm basically seeing now is that any external monitor (either a > Dell 30" or Dell 24") will be seen after a reboot or a restart of the > X server. But if suspend the laptop, disconnect from the dock, and > resume, and then later on, reconnect to the dock, the external > monitors are not visible until I kill and restart the X server. > Another part of the symptom is when I try to probe for the monitors, > using either xrandr or xfce4-display-settings, the system freezes for > a second or two, and then when it recovers, if I look in the logs, I > see the following warning message, repeated twice: I suspect a lot of the problems are just that xfce isn't sufficiently handling randr events, and it is getting out of sync, it is like hotplug networking before NetworkManager etc. I just tried using XFCE from F21 and if I leave the display settings app open it crashes hard when I tried the cycle above, which didn't lend me much confidence, it also never reenabled the monitor when it came back, I've tried a few cycles of this with GNOME desktop and it seems to work pretty well. I'll try reproducing the exact problem you are seeing however, I haven't managed that with drm-next tree which has v3.18 merged now. The i915 driver also has a tendency to WARN_ON on pointless things, the i915 developers insist these are actual bugs, but don't insist on producing patches to fix them in a reasonable time frame or if they do, they add 5 more WARN_ONs to compensate. Dave. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
