On Mon, 07 Jul 2014, Paul Livingston <p...@accokeekwoods.com> wrote: > I recently built a new desktop machine using a Shuttle SZ87R6, an I7-4770S > and a Dell U2713HM monitor. Did my initial HW burn-in and testing using a > Fedora 20 KDE Spin Live CD (Kernel 3.11.10-301.fc20.x86_64 & KDE Systems > settings v4.11.3) using the DVI port on the computer and display and a dual > link DVD-D cable, everything worked fine and the display resolution was > 2560x1440 (native for the display). Both the monitor OSD and the KDE Systems > Setting applet correctly reported both the resolution and the port DVI. The > last of the parts came in (HD for secondary storage) and I finished the build > and did an ion disk nstall and a full system update (Kernel > 3.14.8-200.fc20.x86_64 and KDE System Settings v4.11.10, along with ~=750MB > of other updates) The display looked odd after rebooting and when I checked > it was set to 1600x1200 (not only wrong resolution but wrong aspect ratio) > and the KDE applet now reported that the interface was HDMI vice the actual > DVI. > > Checked the U2713HM OSD and found that while the max resolution was > 2560x1440, current resolution was 1600x1200 and the interface was correctly > reported (DVI-D). Verified the interconnection was DVI-D to DVI-D via a dual > link DVI cable. Went back inside the OS and rechecked the Display and > Monitor settings in Systems Settings and maximum available resolution was > 1600x1200 (which is what the display was set to). also noted that the Display > and Monitor applet was reporting an HDMI interconnect vice the actual DVI-D. > Ran xrandr from the command line and found that while 1920x1200 was shown as > an available resolution (at least the correct aspect ratio), I could not set > it to that using the command line. Scratched my head and spent several > hours Googling to see if anyone else had run into this problem - no luck, > although there were some postings from roughly a year ago about people in the > Win8 world having video problems with the HD 4600 IGA. I then spent some > time on the Intel si te > , found several conflicting threads on HD 4600 capability and did an > explicit update to the latest version of the Intel video stack for Linux. No > change and still unable to reset video resolution or aspect ratio from within > F20. BTW, going back to the earlier kernel is not really a viable option as > I wanted the privilege escalation bug fix that came out in 3.14.6, however > with the earlier kernel both the resolution and aspect ratio is correct. > > At this stage, I have pretty well established (at least in my own mind) that > it is a SW vice a HW problem and it is entirely reproducible as when I reboot > with the Live CD the 2560x1440 resolution comes up by default. While at this > point I rather strongly suspect the Intel i915 driver and video stack, it > could also be either a KDE or an xorg or a kernel issue and I really don' > know where to file a bug report since I can't nail down which SW is screwing > up or what to try next. Seems odd that Intel would disable a HW capability > that was working just fine as part of a driver update, not sure what the > rationale for that would be > > Any ideas, insight or suggestions would be most welcome.
https://bugzilla.kernel.org/show_bug.cgi?id=72961 BR, Jani. > > Thanks > > Paul Livingston > <p...@accokeekwoods.com> > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
