<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [BXT-P/APL] Low performance on UI, even without graphic interface" href="https://bugs.freedesktop.org/show_bug.cgi?id=93797#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [BXT-P/APL] Low performance on UI, even without graphic interface" href="https://bugs.freedesktop.org/show_bug.cgi?id=93797">bug 93797</a> from <a class="email" href="mailto:imre.deak@intel.com" title="Imre Deak <imre.deak@intel.com>"> Imre Deak</a> <pre>(In reply to Imre Deak from <a href="show_bug.cgi?id=93797#c11">comment #11</a>) > (In reply to Elio from <a href="show_bug.cgi?id=93797#c10">comment #10</a>) > > Sure, in the middle time in setting maxcpus in grub with 1 and it looks a > > lot better. > > Ok, I can confirm this, I can see it on my system as well now. This started > to happen when I upgraded to the BIOS I suggested to you in <a href="show_bug.cgi?id=93797#c9">comment#9</a>, so > probably that won't solve your problem. Booting with maxcpus=1 gets rid of > the issue for me too. I will try now different BIOS versions to see which > one is the latest that works. > > Meanwhile this isn't a graphics driver issue, I can see the problem even if > I don't start the graphical interface, just by trying to type something on > the text console. I notified already the core people (Mika Westerberg), he > promised to take a look at this. One more thing I noticed that this is somehow related to GFX RC6 state. If we disable that via BIOS (Uncore/Render:C6 disable, GT PM: disable) or by booting with i915.enable_rc6=0 then we also don't have the problem. I assume entering RC6 would enable some deeper CPU/system level power state, which could cause this lag.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>