Bug 204537
| Summary: | Complete Xorg freeze due to intermittent unstable tsc on Dell Precision 5540 (Coffeelake): Broken BIOS? | ||
|---|---|---|---|
| Product: | Timers | Reporter: | Arcadiy Ivanov (arcadiy) |
| Component: | Interval Timers | Assignee: | timers_interval-timers |
| Status: | NEW --- | ||
| Severity: | high | CC: | kai.heng.feng, superm1 |
| Priority: | P1 | ||
| Hardware: | Intel | ||
| OS: | Linux | ||
| Kernel Version: | 5.1.20 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
Does the issue get resolved with kernel parameter "tsc=reliable"? Do you mean 'tsc=unstable'? [ 0.423575] Kernel command line: BOOT_IMAGE=(hd0,gpt2)/vmlinuz-5.1.20-300.fc30.x86_64 root=/dev/mapper/fedora-root ro resume=/dev/mapper/fedora-swap rd.lvm.lv=fedora/root rd.lvm.lv=fedora/swap rootflags=discard rd.driver.blacklist=nouveau i915.enable_guc=3 l1tf=flush acpi_osi=Linux-Dell-Video tsc=unstable [ 0.423676] tsc: Marking TSC unstable due to boot parameter Will see if it works. `tsc=unstable` appears to be resolving this problem. Will try with `tsc=reliable` now. Can you please test this patch: https://lkml.org/lkml/2019/8/29/233 I've been running with `tsc=reliable` for several months and the problem is gone. I guess it is bug #203183 after all. |
The symptoms are intermittent (Fedora 30 KDE latest updates): 1. X freezes. Mouse cursor still moves, tty still works but X will not respond to any clicks/key combinations. 2. Switching to tty and issuing a reboot command, receive the following set of errors. 3. I suspect X tries to play a sound, ends up stuck in ALSA that is itself stuck due to unstable TSC, but that's an uneducated guess. ========= Manufacturer: Dell Inc. Product Name: Precision 5540 Product Name: 0V030K Version: A00 BIOS Information Vendor: Dell Inc. Version: 1.2.3 Release Date: 07/23/2019 Kernel: 5.1.20-300.fc30.x86_64 === Aug 09 01:22:18 hostname kernel: alsactl[1527]: segfault at 28 ip 000055e8e10bb6f0 sp 00007ffc12a3a158 error 4 in alsactl[55e8e10ad000+11000] Aug 09 01:22:18 hostname kernel: Code: 4c 89 e6 e8 02 2c ff ff 89 ef e8 4b 2a ff ff ba 0a 00 00 00 31 f6 4c 89 e7 c6 44 24 17 00 e8 67 31 ff ff eb b2 e8 00 34 ff ff <8b> 06 41 54 55 48 89 fd 53 85 c0 7e 22 49 89 f4 31 db 66 0f 1f> Aug 09 01:22:24 hostname kernel: clocksource: timekeeping watchdog on CPU12: Marking clocksource 'tsc' as unstable because the skew is too large: Aug 09 01:22:24 hostname kernel: clocksource: 'hpet' wd_now: fc44fc84 wd_last: fba84649 mask: ffffffff Aug 09 01:22:24 hostname kernel: clocksource: 'tsc' cs_now: 3a41f2261e40 cs_last: 3a41ab28c198 mask: ffffffffffffffff Aug 09 01:22:24 hostname kernel: tsc: Marking TSC unstable due to clocksource watchdog Aug 09 01:22:24 hostname kernel: TSC found unstable after boot, most likely due to broken BIOS. Use 'tsc=unstable'. Aug 09 01:22:24 hostname kernel: sched_clock: Marking unstable (26663054300069, -369815753)<-(26662712684796, -28200423) Aug 09 01:22:24 hostname kernel: clocksource: Switched to clocksource hpet