On 06/15/2017 03:02 PM, Reg Tiangha wrote: > On 06/15/2017 02:51 PM, Zrubi wrote: >> Do we already have any git issues about 4.9 and its currently known >> problems? >> > Nothing centralized that tracks all 4.9 issues/regressions that I'm > aware of, outside of this message thread. Some tickets have been opened > up as needed for specific issues (for example, full-range slub_debug > being enabled exposing a kernel bug that breaks SSL connections) though. > > Sometimes comments or feedback are posted under the relevant kernel > update ticket whenever a new one is pushed out: > > https://github.com/QubesOS/updates-status/issues > > One thing to test would be a variety of different 4.9 releases; while > I'm still leaning towards an X or interaction with newer X issue, it > could also be a regression that was introduced upstream. And it would be > nice to know if this issue is happening on video cards that *aren't* > Intel. Really, the only kernel config option that changed between 4.4 > and 4.9 for Intel cards is that preliminary hardware support option > being changed to enabled by default. If disabling that doesn't fix it, > there there are either bigger issues at play in the kernel *or* the > issue is somewhere else. > > Also, a greater list of specific KDE apps to test would be helpful if > you could provide that. > > Finally, another idea: I believe it was Vik who said that on newer Intel video cards, the i915 driver actually *wasn't* being used in 4.4 because it did not support newer cards, and a generic video driver was being automatically used instead. So maybe that i915 support for newer hardware exists in 4.9 and is actually being used, but is buggy on Haswell or newer which is why it only appears now.
That said, again, I've been running 4.9 on Sandy Bridge for months and the issue didn't show up until I started using Debian 9 templates, so I'm not completely convinced yet that it's 4.9 alone that is the issue. It could be a combination of things, or Qubes video code interacting with newer X alongside the i915 driver included in the 4.9 kernel. Which is why it would really be useful if someone with an AMD or Nvidia video card could try the same set up and see if this rendering issue appears or not. If it doesn't, then it'd help rule out if this is a general problem, or just a problem that appears with Intel video cards. Another thing you could test is running that app suite on a Fedora 23 template (and even Debian 8 if those apps exist there) to see if the problem appears. If it does not, then it's more evidence that newer versions of X might be part of the issue. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/ohut6b%242b7%241%40blaine.gmane.org. For more options, visit https://groups.google.com/d/optout.
