drm/i915: new warning (regression) in 3.7.10 and 3.8.3

[Daniel Vetter]

On Tue, Apr 09, 2013 at 02:54:34PM +0300, Tomas Melin wrote:
> On Mon, 18 Mar 2013 09:32:51 +0100, Daniel Vetter wrote:
> >
> > On Sat, Mar 16, 2013 at 01:28:50PM +0100, Richard Cochran wrote:
> >>
> >> I have an Acer Aspire One netbook, and on it I get the following
> >> warning when closing and opening the lid. I think this warning first
> >> appeared in 3.7.
> >>
> >> Does this need fixing? If so, who can do it?
> >
> > Another pesky BIOS which changes the display state behind our back on lid
> > closing! Should be duct-tapped over with
> >
> > commit 45e2b5f640b3766da3eda48f6c35f088155c06f3
> > Author: Daniel Vetter <daniel.vetter at ffwll.ch>
> > Date:   Fri Nov 23 18:16:34 2012 +0100
> >
> >     drm/i915: force restore on lid open
> >
> > which is in 3.8.
> 
> I'm seeing the same problems on my eeepc using 3.8. Happens (most) of
> the time when opening and closing the lid. Any ideas on how to fix
> this?

This should be fixed with the above mentioned patch. The issue is that the
bios fumbles around with the output configuration behind our backs, so the
new paranoid modeset code in 3.7+ freaks out about the state mismatch
between sw and hw.

The patch above should detect this situation and undo any bios-induced
damage.
-Daniel

> 
> -Tomas
> 
> [20314.679749] [drm:i9xx_crtc_mode_set] *ERROR* Couldn't find PLL
> settings for mode!
> 
> [20314.679787] ------------[ cut here ]------------
> [20314.679819] WARNING: at drivers/gpu/drm/i915/intel_display.c:7864
> intel_modeset_check_state+0x4ad/0x620()
> [20314.679831] Hardware name: 901
> [20314.679843] encoder's hw state doesn't match sw tracking (expected
> 1, found 0)
> [20314.679853] Modules linked in: bridge ipv6 rfcomm fuse btusb
> rt2800pci rt2800lib rt2x00pci rt2x00lib atl1e
> [20314.679917] Pid: 10069, comm: kworker/0:0 Tainted: G        W    3.8.0 #8
> [20314.679930] Call Trace:
> [20314.679958]  [<c1033d6d>] warn_slowpath_common+0x6d/0xa0
> [20314.679983]  [<c136645d>] ? intel_modeset_check_state+0x4ad/0x620
> [20314.680006]  [<c136645d>] ? intel_modeset_check_state+0x4ad/0x620
> [20314.680017]  [<c1033e1e>] warn_slowpath_fmt+0x2e/0x30
> [20314.680017]  [<c136645d>] intel_modeset_check_state+0x4ad/0x620
> [20314.680103]  [<c1366d31>] intel_set_mode+0x701/0x990
> [20314.680170]  [<c13695c5>] intel_modeset_setup_hw_state+0x5d5/0x8e0
> [20314.680215]  [<c12e3798>] ? acpi_lid_open+0x28/0x40
> [20314.680236]  [<c136b6db>] intel_lid_notify+0x9b/0xc0
> [20314.680258]  [<c1731ad5>] notifier_call_chain+0x45/0x60
> [20314.680283]  [<c1057f4e>] __blocking_notifier_call_chain+0x3e/0x60
> [20314.680306]  [<c1057f8a>] blocking_notifier_call_chain+0x1a/0x20
> [20314.680329]  [<c12e3839>] acpi_lid_send_state+0x78/0x9d
> [20314.680351]  [<c12e38aa>] acpi_button_notify+0x30/0xa4
> [20314.680376]  [<c12c435e>] acpi_device_notify+0x12/0x15
> [20314.680402]  [<c12cf786>] acpi_ev_notify_dispatch+0x2e/0x45
> [20314.680424]  [<c12c14cb>] acpi_os_execute_deferred+0x1b/0x26
> [20314.680449]  [<c104c800>] process_one_work+0x110/0x380
> [20314.680475]  [<c172ede9>] ? apic_timer_interrupt+0x2d/0x34
> [20314.680498]  [<c12c14b0>] ? acpi_os_wait_events_complete+0x19/0x19
> [20314.680522]  [<c104df89>] worker_thread+0x119/0x340
> [20314.680545]  [<c104de70>] ? manage_workers+0x260/0x260
> [20314.680572]  [<c10522af>] kthread+0x8f/0xa0
> [20314.680598]  [<c1734fb7>] ret_from_kernel_thread+0x1b/0x28
> [20314.680622]  [<c1052220>] ? flush_kthread_work+0xc0/0xc0
> [20314.680640] ---[ end trace 037b36714b28cbdf ]---
> [20314.680661] ------------[ cut here ]------------
> [20314.680684] WARNING: at drivers/gpu/drm/i915/intel_display.c:7898
> intel_modeset_check_state+0x47b/0x620()
> [20314.680697] Hardware name: 901
> [20314.680709] crtc's computed active state doesn't match tracked
> active state (expected 1, found 0)
> [20314.680719] Modules linked in: bridge ipv6 rfcomm fuse btusb
> rt2800pci rt2800lib rt2x00pci rt2x00lib atl1e
> [20314.680898] Pid: 10069, comm: kworker/0:0 Tainted: G        W    3.8.0 #8
> [20314.680910] Call Trace:
> [20314.680934]  [<c1033d6d>] warn_slowpath_common+0x6d/0xa0
> [20314.680960]  [<c136642b>] ? intel_modeset_check_state+0x47b/0x620
> [20314.680983]  [<c136642b>] ? intel_modeset_check_state+0x47b/0x620
> [20314.681006]  [<c1033e1e>] warn_slowpath_fmt+0x2e/0x30
> [20314.681041]  [<c136642b>] intel_modeset_check_state+0x47b/0x620
> [20314.681052]  [<c1366d31>] intel_set_mode+0x701/0x990
> [20314.681095]  [<c13695c5>] intel_modeset_setup_hw_state+0x5d5/0x8e0
> [20314.681122]  [<c12e3798>] ? acpi_lid_open+0x28/0x40
> [20314.681147]  [<c136b6db>] intel_lid_notify+0x9b/0xc0
> [20314.681170]  [<c1731ad5>] notifier_call_chain+0x45/0x60
> [20314.681196]  [<c1057f4e>] __blocking_notifier_call_chain+0x3e/0x60
> [20314.681221]  [<c1057f8a>] blocking_notifier_call_chain+0x1a/0x20
> [20314.681246]  [<c12e3839>] acpi_lid_send_state+0x78/0x9d
> [20314.681270]  [<c12e38aa>] acpi_button_notify+0x30/0xa4
> [20314.681295]  [<c12c435e>] acpi_device_notify+0x12/0x15
> [20314.681320]  [<c12cf786>] acpi_ev_notify_dispatch+0x2e/0x45
> [20314.681344]  [<c12c14cb>] acpi_os_execute_deferred+0x1b/0x26
> [20314.681366]  [<c104c800>] process_one_work+0x110/0x380
> [20314.681392]  [<c172ede9>] ? apic_timer_interrupt+0x2d/0x34
> [20314.681416]  [<c12c14b0>] ? acpi_os_wait_events_complete+0x19/0x19
> [20314.681465]  [<c104df89>] worker_thread+0x119/0x340
> [20314.681516]  [<c104de70>] ? manage_workers+0x260/0x260
> [20314.681568]  [<c10522af>] kthread+0x8f/0xa0
> [20314.681614]  [<c1734fb7>] ret_from_kernel_thread+0x1b/0x28
> [20314.681660]  [<c1052220>] ? flush_kthread_work+0xc0/0xc0
> [20314.681681] ---[ end trace 037b36714b28cbe0 ]---

-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch