我的 Ubuntu 16.04 经常死机，但我无法确定原因。这种情况通常发生在我坐在电脑前时，而不是电脑空闲时，所以这一定与我当时正在执行的操作有关，但这种情况似乎毫无原因地发生。
我认为这个问题可能与我的图形驱动程序有关，因为当它发生时，我的屏幕会变形（出现灰色垂直条纹 - 看起来与冻结之前的屏幕完全不同）。发生这种情况时，声音会不断重复。此外，我的系统变得完全没有响应，我甚至无法Alt+ PrScrn+REISUB它 - 有时甚至硬重置按钮也不起作用。
我在 stackoverflow 上搜索了类似的问题，有人建议这可能与 grub 有关，所以我应用了intel_idle.max_cstate=1修复程序；不幸的是，它没有起作用。
我的 grub 配置中也有radeon.dpm=0内核设置，因为在内核更新后（大约 6 个月前），我的屏幕完全变黑了，这似乎解决了我的问题。我不认为这与我现在遇到的问题有关。
编辑 1：建议的解决方案无法解决我的问题。我检查了我的软件包，它们尚未更新到导致问题的以下版本。
libegl1-mesa 17.2.4-0ubuntu1~16.04.2
libgbm1 17.2.4-0ubuntu1~16.04.2
libgl1-mesa-dri 17.2.4-0ubuntu1~16.04.2
libwayland-egl1-mesa 17.2.4-0ubuntu1~16.04.2
编辑 2：我指的是第一个链接解决方案。很抱歉错过了第二个，因为在编辑屏幕上你看不到链接的解决方案。因此，我继续我所做的，我启动了我的终端并执行了以下操作：
❯ for p in libegl1 libgbm1 libgl1-mesa-dri libwayland-egl1-mesa ; do dpkg -l | grep $p | awk '{print $2, $3}' ; done
libegl1-mesa:amd64 12.0.6-0ubuntu0.16.04.1
libgbm1:amd64 12.0.6-0ubuntu0.16.04.1
libgl1-mesa-dri:amd64 12.0.6-0ubuntu0.16.04.1
libgl1-mesa-dri:i386 12.0.6-0ubuntu0.16.04.1
libwayland-egl1-mesa:amd64 12.0.6-0ubuntu0.16.04.1
如你所见，我安装的软件包都是 12.0.6，而不是 17.2.4，这导致了2018-01-04 更新后，GUI/Unity 在 16.04 LTS 中崩溃，compiz 出现段错误。
至于Ubuntu 14.04 出现视觉伪影和冻结，首先描述很像我的问题，但是：
我没有看到视频 RAM 伪影。一切都很好，直到冻结。下次我遇到冻结时我会拍照，因为它很难描述；它看起来与我之前显示的屏幕完全不同，通常是垂直灰色条纹的图案，类似于这个。重启后，我没有检测到任何系统问题，也没有得到任何结果。我尝试通过
/var/log在冻结之前进行 grepping 来查明问题，但奇怪的是，它没有任何动静。我的机器是双启动的，带有 Windows 10，这是我主要用于玩游戏的操作系统。正如链接答案中提到的，如果这个问题是由于硬件错误引起的，那么我在 Windows 中也会遇到类似的行为（或至少是重启、冻结、蓝屏等）。然而，我没有，这让我相信原因在于软件。
建议我为专有驱动程序运行的命令及其输出：
❯ ubuntu-drivers devices
== cpu-microcode.py ==
driver : intel-microcode - distro free
更多硬件细节：
❯ sudo lshw -c video
*-display
description: VGA compatible controller
product: Juniper XT [Radeon HD 5770]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:07:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:25 memory:d0000000-dfffffff memory:fbfc0000-fbfdffff ioport:e000(size=256) memory:fbfa0000-fbfbffff
❯ uname -a
Linux apparatus 4.4.0-109-generic #132-Ubuntu SMP Tue Jan 9 19:52:39 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
更新：我刚刚遇到了死机，但系统几乎立即（1-2 秒后）自行恢复（我当时不在，所以我没有重置它、触摸它或对它做任何事情）。我注意到它死机是因为 youtube 上正在播放音乐。
我立即坐下来检查 /var/log 以查找更新的日志文件。我发现以下两个文件在系统冻结时已更新：
-rw-r----- 1 syslog adm 892624 Feb 3 18:21 kern.log
-rw-r----- 1 syslog adm 29470 Feb 3 18:21 syslog
及其内容：
/var/log
❯ tail -n 10 kern.log
Feb 3 15:34:32 apparatus kernel: [ 3682.917955] input: Logitech USB Optical Mouse as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2.2/2-1.2.2:1.0/0003:046D:C077.0008/input/input21
Feb 3 15:34:32 apparatus kernel: [ 3682.918115] hid-generic 0003:046D:C077.0008: input,hidraw3: USB HID v1.11 Mouse [Logitech USB Optical Mouse] on usb-0000:00:1d.0-1.2.2/input0
Feb 3 15:39:54 apparatus kernel: [ 4005.321271] perf: interrupt took too long (3920 > 3912), lowering kernel.perf_event_max_sample_rate to 51000
Feb 3 18:21:01 apparatus kernel: [13672.371035] clocksource: timekeeping watchdog on CPU1: Marking clocksource 'tsc' as unstable because the skew is too large:
Feb 3 18:21:01 apparatus kernel: [13672.371045] clocksource: 'acpi_pm' wd_now: 9fec9b wd_last: e2aeff mask: ffffff
Feb 3 18:21:01 apparatus kernel: [13672.371048] clocksource: 'tsc' cs_now: 213bf758e258 cs_last: 2139d0a0958a mask: ffffffffffffffff
Feb 3 18:21:01 apparatus kernel: [13672.371051] tsc: Marking TSC unstable due to clocksource watchdog
Feb 3 18:21:01 apparatus kernel: [13672.372782] TSC found unstable after boot, most likely due to broken BIOS. Use 'tsc=unstable'.
Feb 3 18:21:01 apparatus kernel: [13672.372785] sched_clock: Marking unstable (13671910344755, 462317015)<-(13672496000909, -123220420)
Feb 3 18:21:01 apparatus kernel: [13672.377012] clocksource: Switched to clocksource acpi_pm
和
/var/log
❯ tail -n 200 syslog
...
Feb 3 17:55:01 apparatus CRON[13191]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Feb 3 18:05:01 apparatus CRON[13508]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Feb 3 18:15:01 apparatus CRON[13819]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Feb 3 18:17:01 apparatus CRON[13898]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Feb 3 18:21:01 apparatus kernel: [13672.371035] clocksource: timekeeping watchdog on CPU1: Marking clocksource 'tsc' as unstable because the skew is too large:
Feb 3 18:21:01 apparatus kernel: [13672.371045] clocksource: 'acpi_pm' wd_now: 9fec9b wd_last: e2aeff mask: ffffff
Feb 3 18:21:01 apparatus kernel: [13672.371048] clocksource: 'tsc' cs_now: 213bf758e258 cs_last: 2139d0a0958a mask: ffffffffffffffff
Feb 3 18:21:01 apparatus kernel: [13672.371051] tsc: Marking TSC unstable due to clocksource watchdog
Feb 3 18:21:01 apparatus kernel: [13672.372782] TSC found unstable after boot, most likely due to broken BIOS. Use 'tsc=unstable'.
Feb 3 18:21:01 apparatus kernel: [13672.372785] sched_clock: Marking unstable (13671910344755, 462317015)<-(13672496000909, -123220420)
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: snd_pcm_avail() returned a value that is exceptionally large: 654084 bytes (3707 ms).
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Most likely this is a bug in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA developers.
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: snd_pcm_dump():
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Soft volume PCM
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Control: PCM Playback Volume
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: min_dB: -51
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: max_dB: 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: resolution: 256
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Its setup is:
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: stream : PLAYBACK
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: access : MMAP_INTERLEAVED
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: format : S16_LE
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: subformat : STD
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: channels : 2
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: rate : 44100
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: exact rate : 44100 (44100/1)
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: msbits : 16
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: buffer_size : 16384
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_size : 8192
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_time : 185759
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: tstamp_mode : ENABLE
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: tstamp_type : MONOTONIC
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_step : 1
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: avail_min : 16129
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_event : 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: start_threshold : -1
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: stop_threshold : 4611686018427387904
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: silence_threshold: 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: silence_size : 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: boundary : 4611686018427387904
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Slave: Hardware PCM card 0 'HDA Intel MID' device 0 subdevice 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Its setup is:
Feb 3 18:21:01 apparatus kernel: [13672.377012] clocksource: Switched to clocksource acpi_pm
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: stream : PLAYBACK
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: access : MMAP_INTERLEAVED
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: format : S16_LE
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: subformat : STD
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: channels : 2
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: rate : 44100
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: exact rate : 44100 (44100/1)
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: msbits : 16
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: buffer_size : 16384
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_size : 8192
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_time : 185759
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: tstamp_mode : ENABLE
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: tstamp_type : MONOTONIC
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_step : 1
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: avail_min : 16129
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_event : 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: start_threshold : -1
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: stop_threshold : 4611686018427387904
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: silence_threshold: 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: silence_size : 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: boundary : 4611686018427387904
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: appl_ptr : 331041089
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: hw_ptr : 331188226
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: snd_pcm_delay() returned a value that is exceptionally large: -547748 bytes (-3105 ms).
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Most likely this is a bug in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA developers.
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: snd_pcm_dump():
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Soft volume PCM
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Control: PCM Playback Volume
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: min_dB: -51
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: max_dB: 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: resolution: 256
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Its setup is:
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: stream : PLAYBACK
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: access : MMAP_INTERLEAVED
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: format : S16_LE
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: subformat : STD
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: channels : 2
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: rate : 44100
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: exact rate : 44100 (44100/1)
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: msbits : 16
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: buffer_size : 16384
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_size : 8192
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_time : 185759
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: tstamp_mode : ENABLE
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: tstamp_type : MONOTONIC
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_step : 1
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: avail_min : 16129
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_event : 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: start_threshold : -1
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: stop_threshold : 4611686018427387904
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: silence_threshold: 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: silence_size : 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: boundary : 4611686018427387904
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Slave: Hardware PCM card 0 'HDA Intel MID' device 0 subdevice 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: Its setup is:
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: stream : PLAYBACK
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: access : MMAP_INTERLEAVED
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: format : S16_LE
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: subformat : STD
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: channels : 2
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: rate : 44100
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: exact rate : 44100 (44100/1)
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: msbits : 16
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: buffer_size : 16384
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_size : 8192
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_time : 185759
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: tstamp_mode : ENABLE
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: tstamp_type : MONOTONIC
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_step : 1
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: avail_min : 16129
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: period_event : 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: start_threshold : -1
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: stop_threshold : 4611686018427387904
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: silence_threshold: 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: silence_size : 0
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: boundary : 4611686018427387904
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: appl_ptr : 331051329
Feb 3 18:21:01 apparatus pulseaudio[4553]: [alsa-sink-ALC888 Analog] alsa-util.c: hw_ptr : 331188266