[coreboot] Resume problems on Lenovo X60t

[Paul Menzel]

Dear coreboot folks,


With Linux 4.11-rcX sometimes the Lenovo X60t doesn’t correctly resume
anymore. I still have to do some more tests, but I believe I am unable
to reproduce this issue with Linux 4.10.8. But as I also do not know
how to reproduce it, despite doing suspend and resuming, and see how it
goes, I cannot know for sure. With Linux 4.11-rcX, I’d say the issue
happens one out of ten or 15 times.

```
12.951: [  350.898287] BUG: unable to handle kernel paging request at f8281008
12.951: [  350.898346] IP: gen2_write32+0x62/0x130 [i915]
12.951: [  350.898347] *pde = 34c88067 
12.951: [  350.898349] *pte = 00000000 
12.951: [  350.898349] 
12.951: [  350.898352] Oops: 0002 [#1] SMP
12.951: [  350.898353] Modules linked in: joydev(E) wacom_w8001(E) serport(E) cpufreq_powersave(E) cpufreq_conservative(E) cpufreq_userspace(E) iTCO_wdt(E) iTCO_vendor_support(E) acpi_cpufreq(E) coretemp(E) arc4
(E) kvm_intel(E) lpc_ich(E) kvm(E) mfd_core(E) irqbypass(E) iwl3945(E) iwlegacy(E) i915(E) evdev(E) snd_hda_codec_analog(E) snd_hda_codec_generic(E) snd_pcsp(E) pcmcia(E) serio_raw(E) mac80211(E) rng_core(E) snd
_hda_intel(E) yenta_socket(E) pcmcia_rsrc(E) drm_kms_helper(E) pcmcia_core(E) snd_hda_codec(E) snd_hda_core(E) snd_hwdep(E) thinkpad_acpi(E) snd_pcm(E) drm(E) cfg80211(E) battery(E) nvram(E) i2c_algo_bit(E) snd_
timer(E) fb_sys_fops(E) syscopyarea(E) sysfillrect(E) snd(E) rfkill(E) sysimgblt(E) soundcore(E) video(E) ac(E) button(E) shpchp(E) tpm_tis(E) tpm_tis_core(E) tpm(E) fuse(E) parport_pc(E)
12.951: [  350.898397]  ppdev(E) lp(E) parport(E) autofs4(E) ext4(E) crc16(E) jbd2(E) fscrypto(E) mbcache(E) ecb(E) cbc(E) algif_skcipher(E) af_alg(E) dm_crypt(E) dm_mod(E) sg(E) sr_mod(E) sd_mod(E) cdrom(E) ata
_generic(E) sdhci_pci(E) psmouse(E) sdhci(E) uhci_hcd(E) e1000e(E) ata_piix(E) ahci(E) ehci_pci(E) firewire_ohci(E) libahci(E) i2c_i801(E) libata(E) ehci_hcd(E) ptp(E) mmc_core(E) firewire_core(E) crc_itu_t(E) s
csi_mod(E) usbcore(E) pps_core(E) thermal(E)
12.951: [  350.898429] CPU: 1 PID: 1113 Comm: kworker/u4:32 Tainted: G            E   4.11.0-rc7 #23
12.951: [  350.898431] Hardware name: LENOVO 636338U/636338U, BIOS CBET4000 4.5-1596-gccdb801 04/19/2017
12.951: [  350.898436] Workqueue: events_unbound async_run_entry_fn
12.951: [  350.898438] task: f2588480 task.stack: f258c000
12.951: [  350.898483] EIP: gen2_write32+0x62/0x130 [i915]
12.951: [  350.898484] EFLAGS: 00210282 CPU: 1
12.951: [  350.898486] EAX: f8281008 EBX: f8d80eb0 ECX: 00000001 EDX: f8180000
12.951: [  350.898487] ESI: f658403c EDI: 00000001 EBP: f258de44 ESP: f258de14
12.951: [  350.898488]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
12.951: [  350.898490] CR0: 80050033 CR2: f8281008 CR3: 17589000 CR4: 000006d0
12.951: [  350.898492] Call Trace:
12.951: [  350.898537]  ? i915_gem_restore_gtt_mappings+0x1ca/0x290 [i915]
12.951: [  350.898581]  ? gen9_decoupled_read64+0x270/0x270 [i915]
12.951: [  350.898622]  ? gen6_ggtt_invalidate+0x25/0x30 [i915]
12.951: [  350.898665]  ? i915_gem_resume+0x2d/0x80 [i915]
12.951: [  350.898701]  ? i915_drm_resume+0x38/0x180 [i915]
12.952: [  350.898705]  ? pci_pm_resume+0x4b/0xc0
12.952: [  350.898709]  ? dpm_run_callback+0x53/0x150
12.952: [  350.898713]  ? wait_for_completion+0x2a/0x140
12.952: [  350.898716]  ? pci_pm_thaw+0x90/0x90
12.952: [  350.898718]  ? device_resume+0x87/0x170
12.952: [  350.898720]  ? async_resume+0x1e/0x50
12.952: [  350.898722]  ? async_run_entry_fn+0x35/0x190
12.952: [  350.898726]  ? process_one_work+0x15f/0x3a0
12.952: [  350.898729]  ? worker_thread+0x39/0x470
12.952: [  350.898732]  ? kthread+0xdb/0x110
12.952: [  350.898734]  ? process_one_work+0x3a0/0x3a0
12.952: [  350.898736]  ? kthread_create_on_node+0x30/0x30
12.952: [  350.898739]  ? ret_from_fork+0x1c/0x28
12.952: [  350.898741] Code: d4 a6 e1 f8 bb 02 00 00 00 89 4c 24 08 89 5c 24 04 c7 04 24 49 d1 e0 f8 e8 bc 92 c8 ff 8b 97 d4 03 00 00 8b 45 e8 8b 7d e4 01 d0 <89> 38 83 c4 24 5b 5e 5f 5d c3 8d 74 26 00 64 8b 15 00 31 57 d7
12.952: [  350.898813] EIP: gen2_write32+0x62/0x130 [i915] SS:ESP: 0068:f258de14
12.952: [  350.898814] CR2: 00000000f8281008
12.952: [  350.898817] ---[ end trace 478b15034b0b3e6a ]---
```

Ticket #100739 in the Freedesktop.org Bugzilla [1] tracks this issue.

Chris Wilson replied already.

> The stacktrace is mostly garbage. A register mmio goes wrong. One of
> the suggestions is that the ioremap of the PCI bar is invalid upon
> resume.

coreboot has the TPM patches applied, and is built with native graphics
initialization.

Has anybody else experienced any issues on the Lenovo X60t?

In #coreboot at irc.freenode.net it was mentioned that there might be low
memory corruptions on the Intel 945 devices.

I’d welcome help also from “normal users” to reproduce this issue.


Kind regards,

Paul


[1] https://bugs.freedesktop.org/show_bug.cgi?id=100739
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