On 22 June 2016 at 23:20, Daniel J Blueman <daniel@xxxxxxxxx> wrote: > On 17 Jun 2016 6:23 p.m., "Chris Wilson" <chris@xxxxxxxxxxxxxxxxxx> wrote: >> >> On Fri, Jun 17, 2016 at 06:12:16PM +0800, Daniel J Blueman wrote: >> > On 17 June 2016 at 17:18, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote: >> > > On Fri, Jun 17, 2016 at 05:08:55PM +0800, Daniel J Blueman wrote: >> > >> Hi all! >> > >> >> > >> When unlocking from lightdm, the mouse cursor isn't visible until >> > >> switching VTs. This doesn't occur when using UXA rendering mode >> > >> though, and affects a *lot* of people [1]. It occurs with a range of >> > >> kernels including 4.6.2. >> > >> >> > >> I'm using xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1 >> > >> (current in Ubuntu 16.04 LTS). >> > >> >> > >> How can I approach debugging it? >> > > >> > > Start with a kernel from about 3.19. The trigger was introduced by >> > > xorg-server-1.18.3 which double applied a SETCURSOR ioctl. That should >> > > have been a noop... >> > >> > Thanks for replying Chris! >> > >> > I find the issue occurs in kernels 4.6.2, 4.4.13 and 4.3.6, but does >> > not in 4.2.8 or 4.1.26, however I also see that locking the screen >> > doesn't blank it, so there is behavioural difference also. >> > >> > This may result in a kernel bisect tripping on a large merge; I can >> > take a look if you think the odds are ok? >> >> I would look at -nightly first and hope that is has been fixed (and that >> the fix is trivial). > > No cigar with -nightly, so I'll follow up in a few days after I get through > the 4.2-4.3 kernel bisection. Needed an old toolchain to successfully boot these kernels; no issues on 3.16, but the cursor disappears after screen locking and unlocking on 3.17 and later kernels. Due to some bisect skipping due to DPMS-on failure, it alas bisects to some large merges as expected: 7707e6535f43328e05e4729ac96eee864b90e8a4 ca5a1b9ba0fb5291b555a23b76dbe5f6c30bfd7a c51f71679042a5f388d9580ffbede14c897f1e86 Thanks, Daniel -- Daniel J Blueman _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
