[mythtv-users] X11 freeze after screen blanking with Haswell mobile

[Karl Newman]

On Thu, Jan 8, 2015 at 8:08 PM, Karl Newman <newmank1 at asme.org> wrote:

> On Thu, Jan 8, 2015 at 7:09 PM, Matt Garman <matthew.garman at gmail.com>
> wrote:
>
>> On Wed, Jan 7, 2015 at 9:04 AM, Karl Newman <newmank1 at asme.org> wrote:
>> > Just to follow up on this--after I downgraded xscreensaver I still got a
>> > freeze, so I upgraded my main frontend (Sandy Bridge) to
>> xf86-video-intel
>> > version 2.99.917. I'll see if that fixes it.
>>
>> Any success with this?  Or too early to say?
>>
>> Thanks!
>>
>
> Nope, that didn't fix it either. In fact it made it worse, because after
> it froze I hit Esc and End and eventually it restarted X but it came back
> with a black screen and I had to reboot. So I reverted to the latest stable
> version (which was still freezing but at least recoverable). So I'm back on
> xf86-video-intel 2.21.15. Oh, kernel 3.17.7 (with Gentoo patches) by the
> way.
>
> I did poke into the kernel log and while there's nothing at the time of
the freeze, it does show an event when I exit X. Here's the relevant
snippet:
Jan 09 06:11:18 [kernel] [43706.644369] ------------[ cut here ]------------
Jan 09 06:11:18 [kernel] [43706.644378] WARNING: CPU: 1 PID: 12472 at
drivers/gpu/drm/i915/intel_display.c:3361 intel_crtc_wait_for_
pending_flips+0x180/0x190()
Jan 09 06:11:18 [kernel] [43706.644393] Modules linked in: w83627ehf
hwmon_vid iptable_nat nf_nat_ipv4 nf_nat fuse ivtv_alsa wm8775
tuner cx25840 ivtv tveeprom coretemp imon hwmon cx2341x
x86_pkg_temp_thermal crc32c_intel pcspkr psmouse wmi ata_generic pata_acpi x
hci_hcd pata_via ehci_pci ehci_hcd
Jan 09 06:11:18 [kernel] [43706.644396] CPU: 1 PID: 12472 Comm: X Not
tainted 3.17.7-gentoo #2
Jan 09 06:11:18 [kernel] [43706.644397] Hardware name: System manufacturer
System Product Name/P8H67-M PRO, BIOS 3904 04/27/2013
Jan 09 06:11:18 [kernel] [43706.644400]  0000000000000009 ffff8801f54bf800
ffffffff81893f00 0000000000000000
Jan 09 06:11:18 [kernel] [43706.644401]  ffff8801f54bf838 ffffffff81059a83
0000000000000000 ffff880225f6e000
Jan 09 06:11:18 [kernel] [43706.644403]  ffff880037788150 ffff8802246a2000
0000000000000000 ffff8801f54bf848
Jan 09 06:11:18 [kernel] [43706.644404] Call Trace:
Jan 09 06:11:18 [kernel] [43706.644410]  [<ffffffff81893f00>]
dump_stack+0x4d/0x6f
Jan 09 06:11:18 [kernel] [43706.644414]  [<ffffffff81059a83>]
warn_slowpath_common+0x73/0x90
Jan 09 06:11:18 [kernel] [43706.644416]  [<ffffffff81059b55>]
warn_slowpath_null+0x15/0x20
Jan 09 06:11:18 [kernel] [43706.644420]  [<ffffffff81509b60>]
intel_crtc_wait_for_pending_flips+0x180/0x190
Jan 09 06:11:18 [kernel] [43706.644423]  [<ffffffff8108af90>] ?
prepare_to_wait_event+0x100/0x100
Jan 09 06:11:18 [kernel] [43706.644425]  [<ffffffff81510d4f>]
intel_crtc_disable_planes+0x2f/0x160
Jan 09 06:11:18 [kernel] [43706.644427]  [<ffffffff815114a5>]
ironlake_crtc_disable+0x45/0x790
Jan 09 06:11:18 [kernel] [43706.644430]  [<ffffffff81503e47>] ?
intel_dump_pipe_config.isra.55+0x37/0x350
Jan 09 06:11:18 [kernel] [43706.644434]  [<ffffffff814b3392>] ?
drm_match_cea_mode+0x12/0x20
Jan 09 06:11:18 [kernel] [43706.644436]  [<ffffffff8150bc51>]
__intel_set_mode+0x7a1/0x1620
Jan 09 06:11:18 [kernel] [43706.644438]  [<ffffffff81514021>]
intel_set_mode+0x11/0x30
Jan 09 06:11:18 [kernel] [43706.644440]  [<ffffffff81514f6c>]
intel_crtc_set_config+0x91c/0xe50
Jan 09 06:11:18 [kernel] [43706.644443]  [<ffffffff814aa794>]
drm_mode_set_config_internal+0x64/0xf0
Jan 09 06:11:18 [kernel] [43706.644447]  [<ffffffff81499b9b>]
restore_fbdev_mode+0xab/0xd0
Jan 09 06:11:18 [kernel] [43706.644450]  [<ffffffff81499bde>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x1e/0x40
Jan 09 06:11:18 [kernel] [43706.644452]  [<ffffffff8149b6e3>]
drm_fb_helper_set_par+0x23/0x70
Jan 09 06:11:18 [kernel] [43706.644455]  [<ffffffff8151f345>]
intel_fbdev_set_par+0x15/0x60
Jan 09 06:11:18 [kernel] [43706.644457]  [<ffffffff814517ef>]
fb_set_var+0x19f/0x410
Jan 09 06:11:18 [kernel] [43706.644462]  [<ffffffff810e3105>] ?
pagecache_get_page+0xf5/0x1e0
Jan 09 06:11:18 [kernel] [43706.644466]  [<ffffffff8144c44e>]
fbcon_blank+0x1ce/0x320
Jan 09 06:11:18 [kernel] [43706.644469]  [<ffffffff814327e3>]
do_unblank_screen+0xa3/0x1c0
Jan 09 06:11:18 [kernel] [43706.644472]  [<ffffffff8142a0d3>]
vt_ioctl+0x10c3/0x1140
Jan 09 06:11:18 [kernel] [43706.644474]  [<ffffffff818918f4>] ?
__slab_free+0xf9/0x2af
Jan 09 06:11:18 [kernel] [43706.644477]  [<ffffffff811645e9>] ?
__fsnotify_inode_delete+0x9/0x10
Jan 09 06:11:18 [kernel] [43706.644481]  [<ffffffff8141fc65>]
tty_ioctl+0x265/0xb90
Jan 09 06:11:18 [kernel] [43706.644483]  [<ffffffff811256d0>] ?
kfree+0xd0/0x110
Jan 09 06:11:18 [kernel] [43706.644485]  [<ffffffff8114a2f3>] ?
mntput_no_expire+0x23/0x130
Jan 09 06:11:18 [kernel] [43706.644488]  [<ffffffff8113e670>]
do_vfs_ioctl+0x2e0/0x4c0
Jan 09 06:11:18 [kernel] [43706.644489]  [<ffffffff81147eb9>] ?
__fget+0x69/0xb0
Jan 09 06:11:18 [kernel] [43706.644491]  [<ffffffff8113e88c>]
SyS_ioctl+0x3c/0x80
Jan 09 06:11:18 [kernel] [43706.644495]  [<ffffffff8189d0d2>]
system_call_fastpath+0x16/0x1b
Jan 09 06:11:18 [kernel] [43706.644496] ---[ end trace 28be35dfe0d311ab ]---

I haven't had time to search on this yet. It appears something in the
kernel changed and caused this instability, I'm guessing around kernel
version 3.14. It's entirely possibly my freeze has a different root cause
than yours though...

Karl
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