最近我一直在 Thinkpad 10 第二代平板电脑上玩 Linux。目前 Fedora 24 正在其上运行。当我从 USB 记忆棒（实时模式）启动时，触摸屏工作并被检测为 Wacom 5020 HID，但安装后触摸屏不起作用，并且 xinput 未检测到。
以下是我从实时映像和已安装操作系统（分别为@live 和@install）获得的一些信息：
笔记：因为lspci和lsusb是相同的，所以我省略了它们以避免 30 000 个字符的限制。
lsmod
[user@live ~]$ lsmod
Module Size Used by
ac97_bus 16384 1 snd_soc_core
acpi_pad 36864 0
acpi_thermal_rel 16384 1 int3400_thermal
auth_rpcgss 61440 1 nfsd
bluetooth 491520 11 bnep,btbcm,btqca,hci_uart,btintel
bnep 20480 2
brcmfmac 249856 0
brcmutil 16384 1 brcmfmac
bridge 126976 1 ebtable_broute
btbcm 16384 1 hci_uart
btintel 16384 1 hci_uart
btqca 16384 1 hci_uart
cfg80211 565248 1 brcmfmac
coretemp 16384 0
crc32_pclmul 16384 0
crc32c_intel 24576 0
crct10dif_pclmul 16384 0
drm 335872 5 i915,drm_kms_helper
drm_kms_helper 131072 1 i915
ebtable_broute 16384 1
ebtable_filter 16384 1
ebtable_nat 16384 1
ebtables 32768 3 ebtable_broute,ebtable_nat,ebtable_filter
fat 65536 1 vfat
fjes 28672 0
fuse 98304 3
ghash_clmulni_intel 16384 0
grace 16384 2 nfsd,lockd
hci_uart 77824 0
i2c_algo_bit 16384 1 i915
i2c_designware_core 20480 1 i2c_designware_platform
i2c_designware_platform 16384 0
i2c_hid 20480 0
i915 1220608 15
iTCO_vendor_support 16384 1 iTCO_wdt
iTCO_wdt 16384 0
int3400_thermal 16384 0
int3403_thermal 16384 0
int340x_thermal_zone 16384 2 processor_thermal_device,int3403_thermal
intel_hid 16384 0
intel_rapl 20480 0
intel_soc_dts_iosf 16384 1 processor_thermal_device
ip6_tables 28672 5 ip6table_filter,ip6table_mangle,ip6table_security,ip6table_nat,ip6table_raw
ip6t_REJECT 16384 2
ip6t_rpfilter 16384 1
ip6table_filter 16384 1
ip6table_mangle 16384 1
ip6table_nat 16384 1
ip6table_raw 16384 1
ip6table_security 16384 1
ip_set 36864 0
iptable_mangle 16384 1
iptable_nat 16384 1
iptable_raw 16384 1
iptable_security 16384 1
irqbypass 16384 1 kvm
joydev 20480 0
kvm 552960 1 kvm_intel
kvm_intel 184320 0
llc 16384 2 stp,bridge
lockd 90112 1 nfsd
loop 28672 6
lpc_ich 24576 0
mei 98304 1 mei_txe
mei_txe 20480 0
mmc_block 36864 3
mmc_core 126976 4 mmc_block,sdhci,brcmfmac,sdhci_acpi
nf_conntrack 106496 8 nf_conntrack_netbios_ns,nf_nat,nf_nat_ipv4,nf_nat_ipv6,xt_conntrack,nf_conntrack_broadcast,nf_conntrack_ipv4,nf_conntrack_ipv6
nf_conntrack_broadcast 16384 1 nf_conntrack_netbios_ns
nf_conntrack_ipv4 16384 11
nf_conntrack_ipv6 20480 12
nf_conntrack_netbios_ns 16384 0
nf_defrag_ipv4 16384 1 nf_conntrack_ipv4
nf_defrag_ipv6 36864 1 nf_conntrack_ipv6
nf_nat 24576 2 nf_nat_ipv4,nf_nat_ipv6
nf_nat_ipv4 16384 1 iptable_nat
nf_nat_ipv6 16384 1 ip6table_nat
nf_reject_ipv6 16384 1 ip6t_REJECT
nfnetlink 16384 1 ip_set
nfs_acl 16384 1 nfsd
nfsd 323584 1
processor_thermal_device 16384 0
rfkill 24576 7 cfg80211,bluetooth
scsi_dh_alua 16384 0
scsi_dh_emc 16384 0
scsi_dh_rdac 16384 0
scsi_transport_iscsi 94208 0
sdhci 45056 1 sdhci_acpi
sdhci_acpi 16384 0
shpchp 36864 0
snd 77824 7 snd_soc_core,snd_timer,snd_pcm,snd_seq,snd_soc_sst_mfld_platform,snd_seq_device,snd_compress
snd_compress 20480 1 snd_soc_core
snd_intel_sst_acpi 16384 0
snd_intel_sst_core 73728 1 snd_intel_sst_acpi
snd_pcm 114688 3 snd_soc_core,snd_soc_sst_mfld_platform,snd_pcm_dmaengine
snd_pcm_dmaengine 16384 1 snd_soc_core
snd_seq 69632 0
snd_seq_device 16384 1 snd_seq
snd_soc_core 204800 1 snd_soc_sst_mfld_platform
snd_soc_sst_match 16384 1 snd_intel_sst_acpi
snd_soc_sst_mfld_platform 90112 1 snd_intel_sst_core
snd_timer 32768 2 snd_pcm,snd_seq
soc_button_array 16384 0
soundcore 16384 1 snd
sparse_keymap 16384 1 intel_hid
spi_pxa2xx_platform 24576 0
squashfs 49152 1
stp 16384 1 bridge
sunrpc 319488 7 nfsd,auth_rpcgss,lockd,nfs_acl
tpm 40960 2 tpm_crb,tpm_tis
tpm_crb 16384 0
tpm_tis 20480 0
uas 24576 0
usb_storage 65536 2 uas
vfat 20480 1
video 40960 1 i915
wacom 90112 0
wmi 20480 0
xt_conntrack 16384 21
请注意，它们处于升序模式以便于比较，并且该wacom模块已加载到两者上。
[user@install ~]$ lsmod
Module Size Used by
ac97_bus 16384 1 snd_soc_core
acpi_pad 36864 0
acpi_thermal_rel 16384 1 int3400_thermal
auth_rpcgss 61440 1 nfsd
bluetooth 491520 11 bnep,btbcm,btqca,hci_uart,btintel
bnep 20480 2
brcmfmac 249856 0
brcmutil 16384 1 brcmfmac
bridge 126976 1 ebtable_broute
btbcm 16384 1 hci_uart
btintel 16384 1 hci_uart
btqca 16384 1 hci_uart
cfg80211 565248 1 brcmfmac
coretemp 16384 0
crc32_pclmul 16384 0
crc32c_intel 24576 0
crct10dif_pclmul 16384 0
drm 335872 9 i915,drm_kms_helper
drm_kms_helper 131072 1 i915
ebtable_broute 16384 1
ebtable_filter 16384 1
ebtable_nat 16384 1
ebtables 32768 3 ebtable_broute,ebtable_nat,ebtable_filter
fat 65536 1 vfat
fjes 28672 0
fuse 98304 4
ghash_clmulni_intel 16384 0
grace 16384 2 nfsd,lockd
hci_uart 77824 0
i2c_algo_bit 16384 1 i915
i2c_designware_core 20480 1 i2c_designware_platform
i2c_designware_platform 16384 0
i2c_hid 20480 0
i915 1220608 13
iTCO_vendor_support 16384 1 iTCO_wdt
iTCO_wdt 16384 0
int3400_thermal 16384 0
int3403_thermal 16384 0
int340x_thermal_zone 16384 2 processor_thermal_device,int3403_thermal
intel_hid 16384 0
intel_rapl 20480 0
intel_soc_dts_iosf 16384 1 processor_thermal_device
ip6_tables 28672 5 ip6table_filter,ip6table_mangle,ip6table_security,ip6table_nat,ip6table_raw
ip6t_REJECT 16384 2
ip6t_rpfilter 16384 1
ip6table_filter 16384 1
ip6table_mangle 16384 1
ip6table_nat 16384 1
ip6table_raw 16384 1
ip6table_security 16384 1
ip_set 36864 0
iptable_mangle 16384 1
iptable_nat 16384 1
iptable_raw 16384 1
iptable_security 16384 1
irqbypass 16384 1 kvm
joydev 20480 0
kvm 552960 1 kvm_intel
kvm_intel 184320 0
llc 16384 2 stp,bridge
lockd 90112 1 nfsd
lpc_ich 24576 0
mei 98304 1 mei_txe
mei_txe 20480 0
mmc_block 36864 4
mmc_core 126976 4 mmc_block,sdhci,brcmfmac,sdhci_acpi
nf_conntrack 106496 8 nf_conntrack_netbios_ns,nf_nat,nf_nat_ipv4,nf_nat_ipv6,xt_conntrack,nf_conntrack_broadcast,nf_conntrack_ipv4,nf_conntrack_ipv6
nf_conntrack_broadcast 16384 1 nf_conntrack_netbios_ns
nf_conntrack_ipv4 16384 11
nf_conntrack_ipv6 20480 12
nf_conntrack_netbios_ns 16384 0
nf_defrag_ipv4 16384 1 nf_conntrack_ipv4
nf_defrag_ipv6 36864 1 nf_conntrack_ipv6
nf_nat 24576 2 nf_nat_ipv4,nf_nat_ipv6
nf_nat_ipv4 16384 1 iptable_nat
nf_nat_ipv6 16384 1 ip6table_nat
nf_reject_ipv6 16384 1 ip6t_REJECT
nfnetlink 16384 1 ip_set
nfs_acl 16384 1 nfsd
nfsd 323584 1
processor_thermal_device 16384 0
rfkill 24576 7 cfg80211,bluetooth
sdhci 45056 1 sdhci_acpi
sdhci_acpi 16384 0
shpchp 36864 0
snd 77824 7 snd_soc_core,snd_timer,snd_pcm,snd_seq,snd_soc_sst_mfld_platform,snd_seq_device,snd_compress
snd_compress 20480 1 snd_soc_core
snd_intel_sst_acpi 16384 0
snd_intel_sst_core 73728 1 snd_intel_sst_acpi
snd_pcm 114688 3 snd_soc_core,snd_soc_sst_mfld_platform,snd_pcm_dmaengine
snd_pcm_dmaengine 16384 1 snd_soc_core
snd_seq 69632 0
snd_seq_device 16384 1 snd_seq
snd_soc_core 204800 1 snd_soc_sst_mfld_platform
snd_soc_sst_match 16384 1 snd_intel_sst_acpi
snd_soc_sst_mfld_platform 90112 1 snd_intel_sst_core
snd_timer 32768 2 snd_pcm,snd_seq
soc_button_array 16384 0
soundcore 16384 1 snd
sparse_keymap 16384 1 intel_hid
spi_pxa2xx_platform 24576 0
stp 16384 1 bridge
sunrpc 319488 7 nfsd,auth_rpcgss,lockd,nfs_acl
tpm 40960 2 tpm_crb,tpm_tis
tpm_crb 16384 0
tpm_tis 20480 0
vfat 20480 1
video 40960 1 i915
wacom 90112 0
wmi 20480 0
xt_conntrack 16384 21
xinput——列表
[user@live ~]$ xinput --list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ SIGMACHIP Usb Mouse id=8 [slave pointer (2)]
⎜ ↳ Wacom HID 5020 Pen stylus id=11 [slave pointer (2)]
⎜ ↳ Wacom HID 5020 Finger id=12 [slave pointer (2)]
⎜ ↳ Wacom HID 5020 Pen eraser id=14 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Video Bus id=6 [slave keyboard (3)]
↳ Power Button id=7 [slave keyboard (3)]
↳ Logitech USB Keyboard id=9 [slave keyboard (3)]
↳ Logitech USB Keyboard id=10 [slave keyboard (3)]
↳ Intel HID events id=13 [slave keyboard (3)]
安装的操作系统不显示 Wacom HID 5020：
[user@install ~]$ xinput --list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ SIGMACHIP Usb Mouse id=8 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Video Bus id=6 [slave keyboard (3)]
↳ Power Button id=7 [slave keyboard (3)]
↳ Logitech USB Keyboard id=9 [slave keyboard (3)]
↳ Logitech USB Keyboard id=10 [slave keyboard (3)]
↳ Intel HID events id=11 [slave keyboard (3)]
即使它们被列在/proc/bus/input/devices
猫/proc/总线/输入/设备
[user@live ~]$ cat /proc/bus/input/devices
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=3
B: KEY=10000000000000 0
I: Bus=0019 Vendor=0000 Product=0005 Version=0000
N: Name="Lid Switch"
P: Phys=PNP0C0D/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input1
U: Uniq=
H: Handlers=event1
B: PROP=0
B: EV=21
B: SW=1
I: Bus=0003 Vendor=046d Product=c31c Version=0110
N: Name="Logitech USB Keyboard"
P: Phys=usb-0000:00:14.0-2.4/input0
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.4/1-2.4:1.0/0003:046D:C31C.0002/input/input3
U: Uniq=
H: Handlers=sysrq kbd leds event3
B: PROP=0
B: EV=120013
B: KEY=1000000000007 ff9f207ac14057ff febeffdfffefffff fffffffffffffffe
B: MSC=10
B: LED=1f
I: Bus=0003 Vendor=046d Product=c31c Version=0110
N: Name="Logitech USB Keyboard"
P: Phys=usb-0000:00:14.0-2.4/input1
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.4/1-2.4:1.1/0003:046D:C31C.0003/input/input4
U: Uniq=
H: Handlers=kbd event4
B: PROP=0
B: EV=1b
B: KEY=2010000 397ad801d001 1e000000000000 0
B: ABS=100000000
B: MSC=10
I: Bus=0003 Vendor=1c4f Product=0003 Version=0110
N: Name="SIGMACHIP Usb Mouse"
P: Phys=usb-0000:00:14.0-2.3/input0
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.3/1-2.3:1.0/0003:1C4F:0003.0004/input/input5
U: Uniq=
H: Handlers=mouse0 event2
B: PROP=0
B: EV=17
B: KEY=70000 0 0 0 0
B: REL=103
B: MSC=10
I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="Intel HID events"
P: Phys=
S: Sysfs=/devices/pci0000:00/INT33D5:00/input/input6
U: Uniq=
H: Handlers=kbd event5 rfkill
B: PROP=0
B: EV=13
B: KEY=81000300000000 5000004000 1e294000000020 0
B: MSC=10
I: Bus=0018 Vendor=056a Product=5020 Version=0100
N: Name="Wacom HID 5020 Pen"
P: Phys=i2c-WCOM5020:00
S: Sysfs=/devices/pci0000:00/808622C1:05/i2c-5/i2c-WCOM5020:00/0018:056A:5020.0005/input/input7
U: Uniq=
H: Handlers=mouse1 event6
B: PROP=2
B: EV=1b
B: KEY=1c03 0 0 0 0 0
B: ABS=1000003
B: MSC=1
I: Bus=0018 Vendor=056a Product=5020 Version=0100
N: Name="Wacom HID 5020 Finger"
P: Phys=i2c-WCOM5020:00
S: Sysfs=/devices/pci0000:00/808622C1:05/i2c-5/i2c-WCOM5020:00/0018:056A:5020.0005/input/input8
U: Uniq=
H: Handlers=mouse2 event7
B: PROP=2
B: EV=b
B: KEY=400 0 0 0 0 0
B: ABS=260800000000003
I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input10
U: Uniq=
H: Handlers=kbd event8
B: PROP=0
B: EV=3
B: KEY=3e000b00000000 0 0 0
对于已安装的操作系统：
[user@install ~]$ cat /proc/bus/input/devices
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=3
B: KEY=10000000000000 0
I: Bus=0019 Vendor=0000 Product=0005 Version=0000
N: Name="Lid Switch"
P: Phys=PNP0C0D/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input1
U: Uniq=
H: Handlers=event1
B: PROP=0
B: EV=21
B: SW=1
I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input5
U: Uniq=
H: Handlers=kbd event5
B: PROP=0
B: EV=3
B: KEY=3e000b00000000 0 0 0
I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="Intel HID events"
P: Phys=
S: Sysfs=/devices/pci0000:00/INT33D5:00/input/input7
U: Uniq=
H: Handlers=kbd event6 rfkill
B: PROP=0
B: EV=13
B: KEY=81000300000000 5000004000 1e294000000020 0
B: MSC=10
I: Bus=0018 Vendor=056a Product=5020 Version=0100
N: Name="Wacom HID 5020 Pen"
P: Phys=i2c-WCOM5020:00
S: Sysfs=/devices/pci0000:00/808622C1:05/i2c-12/i2c-WCOM5020:00/0018:056A:5020.0005/input/input8
U: Uniq=
H: Handlers=mouse1 event7
B: PROP=2
B: EV=1b
B: KEY=1c03 0 0 0 0 0
B: ABS=1000003
B: MSC=1
I: Bus=0018 Vendor=056a Product=5020 Version=0100
N: Name="Wacom HID 5020 Finger"
P: Phys=i2c-WCOM5020:00
S: Sysfs=/devices/pci0000:00/808622C1:05/i2c-12/i2c-WCOM5020:00/0018:056A:5020.0005/input/input9
U: Uniq=
H: Handlers=mouse2 event8
B: PROP=2
B: EV=b
B: KEY=400 0 0 0 0 0
B: ABS=260800000000003
I: Bus=0003 Vendor=046d Product=c31c Version=0110
N: Name="Logitech USB Keyboard"
P: Phys=usb-0000:00:14.0-2.4/input0
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.4/1-2.4:1.0/0003:046D:C31C.000C/input/input17
U: Uniq=
H: Handlers=sysrq kbd leds event2
B: PROP=0
B: EV=120013
B: KEY=1000000000007 ff9f207ac14057ff febeffdfffefffff fffffffffffffffe
B: MSC=10
B: LED=1f
I: Bus=0003 Vendor=046d Product=c31c Version=0110
N: Name="Logitech USB Keyboard"
P: Phys=usb-0000:00:14.0-2.4/input1
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.4/1-2.4:1.1/0003:046D:C31C.000D/input/input18
U: Uniq=
H: Handlers=kbd event3
B: PROP=0
B: EV=1b
B: KEY=2010000 397ad801d001 1e000000000000 0
B: ABS=100000000
B: MSC=10
I: Bus=0003 Vendor=1c4f Product=0003 Version=0110
N: Name="SIGMACHIP Usb Mouse"
P: Phys=usb-0000:00:14.0-2.3/input0
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.3/1-2.3:1.0/0003:1C4F:0003.000E/input/input19
U: Uniq=
H: Handlers=mouse0 event4
B: PROP=0
B: EV=17
B: KEY=70000 0 0 0 0
B: REL=103
B: MSC=10
最后但并非最不重要的
消息
我不希望任何人浏览所有这些消息，因此这里是与 wacom 相关的消息：
dmesg | grep -i wacom
[user@live ~]$ dmesg | grep -i wacom
[ 21.392115] input: Wacom HID 5020 Pen as /devices/pci0000:00/808622C1:05/i2c-5/i2c-WCOM5020:00/0018:056A:5020.0004/input/input7
[ 21.393193] input: Wacom HID 5020 Finger as /devices/pci0000:00/808622C1:05/i2c-5/i2c-WCOM5020:00/0018:056A:5020.0004/input/input8
[ 21.394768] wacom 0018:056A:5020.0004: hidraw3: I2C HID v1.00 Mouse [WCOM5020:00 056A:5020] on i2c-WCOM5020:00
[ 21.858532] Modules linked in: intel_rapl coretemp snd_intel_sst_acpi kvm_intel snd_intel_sst_core kvm wacom snd_soc_sst_mfld_platform snd_soc_sst_match irqbypass brcmfmac snd_soc_core iTCO_wdt iTCO_vendor_support snd_compress joydev snd_pcm_dmaengine brcmutil ac97_bus cfg80211 snd_seq snd_seq_device snd_pcm i915 hci_uart snd_timer btbcm btqca snd btintel soundcore bluetooth wmi i2c_algo_bit intel_hid drm_kms_helper rfkill i2c_designware_platform sparse_keymap video i2c_designware_core drm mei_txe soc_button_array tpm_crb mei shpchp lpc_ich processor_thermal_device int3403_thermal int3400_thermal intel_soc_dts_iosf acpi_thermal_rel int340x_thermal_zone tpm_tis acpi_pad tpm spi_pxa2xx_platform nfsd auth_rpcgss nfs_acl lockd grace vfat fat squashfs mmc_block uas usb_storage crct10dif_pclmul crc32_pclmul
[ 21.861114] Modules linked in: intel_rapl coretemp snd_intel_sst_acpi kvm_intel snd_intel_sst_core kvm wacom snd_soc_sst_mfld_platform snd_soc_sst_match irqbypass brcmfmac snd_soc_core iTCO_wdt iTCO_vendor_support snd_compress joydev snd_pcm_dmaengine brcmutil ac97_bus cfg80211 snd_seq snd_seq_device snd_pcm i915 hci_uart snd_timer btbcm btqca snd btintel soundcore bluetooth wmi i2c_algo_bit intel_hid drm_kms_helper rfkill i2c_designware_platform sparse_keymap video i2c_designware_core drm mei_txe soc_button_array tpm_crb mei shpchp lpc_ich processor_thermal_device int3403_thermal int3400_thermal intel_soc_dts_iosf acpi_thermal_rel int340x_thermal_zone tpm_tis acpi_pad tpm spi_pxa2xx_platform nfsd auth_rpcgss nfs_acl lockd grace vfat fat squashfs mmc_block uas usb_storage crct10dif_pclmul crc32_pclmul
[ 21.864117] Modules linked in: intel_rapl coretemp snd_intel_sst_acpi kvm_intel snd_intel_sst_core kvm wacom snd_soc_sst_mfld_platform snd_soc_sst_match irqbypass brcmfmac snd_soc_core iTCO_wdt iTCO_vendor_support snd_compress joydev snd_pcm_dmaengine brcmutil ac97_bus cfg80211 snd_seq snd_seq_device snd_pcm i915 hci_uart snd_timer btbcm btqca snd btintel soundcore bluetooth wmi i2c_algo_bit intel_hid drm_kms_helper rfkill i2c_designware_platform sparse_keymap video i2c_designware_core drm mei_txe soc_button_array tpm_crb mei shpchp lpc_ich processor_thermal_device int3403_thermal int3400_thermal intel_soc_dts_iosf acpi_thermal_rel int340x_thermal_zone tpm_tis acpi_pad tpm spi_pxa2xx_platform nfsd auth_rpcgss nfs_acl lockd grace vfat fat squashfs mmc_block uas usb_storage crct10dif_pclmul crc32_pclmul
[ 21.867107] Modules linked in: intel_rapl coretemp snd_intel_sst_acpi kvm_intel snd_intel_sst_core kvm wacom snd_soc_sst_mfld_platform snd_soc_sst_match irqbypass brcmfmac snd_soc_core iTCO_wdt iTCO_vendor_support snd_compress joydev snd_pcm_dmaengine brcmutil ac97_bus cfg80211 snd_seq snd_seq_device snd_pcm i915 hci_uart snd_timer btbcm btqca snd btintel soundcore bluetooth wmi i2c_algo_bit intel_hid drm_kms_helper rfkill i2c_designware_platform sparse_keymap video i2c_designware_core drm mei_txe soc_button_array tpm_crb mei shpchp lpc_ich processor_thermal_device int3403_thermal int3400_thermal intel_soc_dts_iosf acpi_thermal_rel int340x_thermal_zone tpm_tis acpi_pad tpm spi_pxa2xx_platform nfsd auth_rpcgss nfs_acl lockd grace vfat fat squashfs mmc_block uas usb_storage crct10dif_pclmul crc32_pclmul
[ 21.869984] Modules linked in: intel_rapl coretemp snd_intel_sst_acpi kvm_intel snd_intel_sst_core kvm wacom snd_soc_sst_mfld_platform snd_soc_sst_match irqbypass brcmfmac snd_soc_core iTCO_wdt iTCO_vendor_support snd_compress joydev snd_pcm_dmaengine brcmutil ac97_bus cfg80211 snd_seq snd_seq_device snd_pcm i915 hci_uart snd_timer btbcm btqca snd btintel soundcore bluetooth wmi i2c_algo_bit intel_hid drm_kms_helper rfkill i2c_designware_platform sparse_keymap video i2c_designware_core drm mei_txe soc_button_array tpm_crb mei shpchp lpc_ich processor_thermal_device int3403_thermal int3400_thermal intel_soc_dts_iosf acpi_thermal_rel int340x_thermal_zone tpm_tis acpi_pad tpm spi_pxa2xx_platform nfsd auth_rpcgss nfs_acl lockd grace vfat fat squashfs mmc_block uas usb_storage crct10dif_pclmul crc32_pclmul
[ 21.872228] Modules linked in: intel_rapl coretemp snd_intel_sst_acpi kvm_intel snd_intel_sst_core kvm wacom snd_soc_sst_mfld_platform snd_soc_sst_match irqbypass brcmfmac snd_soc_core iTCO_wdt iTCO_vendor_support snd_compress joydev snd_pcm_dmaengine brcmutil ac97_bus cfg80211 snd_seq snd_seq_device snd_pcm i915 hci_uart snd_timer btbcm btqca snd btintel soundcore bluetooth wmi i2c_algo_bit intel_hid drm_kms_helper rfkill i2c_designware_platform sparse_keymap video i2c_designware_core drm mei_txe soc_button_array tpm_crb mei shpchp lpc_ich processor_thermal_device int3403_thermal int3400_thermal intel_soc_dts_iosf acpi_thermal_rel int340x_thermal_zone tpm_tis acpi_pad tpm spi_pxa2xx_platform nfsd auth_rpcgss nfs_acl lockd grace vfat fat squashfs mmc_block uas usb_storage crct10dif_pclmul crc32_pclmul
[ 21.873119] Modules linked in: intel_rapl coretemp snd_intel_sst_acpi kvm_intel snd_intel_sst_core kvm wacom snd_soc_sst_mfld_platform snd_soc_sst_match irqbypass brcmfmac snd_soc_core iTCO_wdt iTCO_vendor_support snd_compress joydev snd_pcm_dmaengine brcmutil ac97_bus cfg80211 snd_seq snd_seq_device snd_pcm i915 hci_uart snd_timer btbcm btqca snd btintel soundcore bluetooth wmi i2c_algo_bit intel_hid drm_kms_helper rfkill i2c_designware_platform sparse_keymap video i2c_designware_core drm mei_txe soc_button_array tpm_crb mei shpchp lpc_ich processor_thermal_device int3403_thermal int3400_thermal intel_soc_dts_iosf acpi_thermal_rel int340x_thermal_zone tpm_tis acpi_pad tpm spi_pxa2xx_platform nfsd auth_rpcgss nfs_acl lockd grace vfat fat squashfs mmc_block uas usb_storage crct10dif_pclmul crc32_pclmul
在已安装的操作系统上：
[user@install ~]$ dmesg | grep -i wacom
[ 9.179647] wacom 0018:056A:5020.0005: wacom_get_report: ran out of retries (last error = -121)
[ 9.179651] wacom 0018:056A:5020.0005: wacom_feature_mapping: could not get HID_DG_CONTACTMAX, defaulting to 16
[ 9.179804] input: Wacom HID 5020 Pen as /devices/pci0000:00/808622C1:05/i2c-12/i2c-WCOM5020:00/0018:056A:5020.0005/input/input8
[ 9.182614] input: Wacom HID 5020 Finger as /devices/pci0000:00/808622C1:05/i2c-12/i2c-WCOM5020:00/0018:056A:5020.0005/input/input9
[ 9.185121] wacom 0018:056A:5020.0005: hidraw3: I2C HID v1.00 Mouse [WCOM5020:00 056A:5020] on i2c-WCOM5020:00
[ 9.193206] wacom 0018:056A:5020.0005: wacom_set_report: ran out of retries (last error = -121)
如您所见，在已安装的操作系统上存在一些与 wacom 相关的错误，但我不知道为什么以及如何修复它们。我已经尝试在 ubuntu 页面上关注触摸屏相关的 wiki，但没有骰子。有 32 个 ttyS，但只有 ttyS0、ttyS4 和 ttyS5 不退出screen，并且这三个在触摸屏幕时都没有给我任何输入。
这里有人遇到过这个或类似的问题吗？如果是，您是如何解决的？
请注意，上面显示的信息并非来自实时模式下的单次启动或已安装操作系统中的单次启动。我已从一种模式重新启动到另一种模式，并根据需要收集信息。
编辑#1：在日志查看器中花费了一段时间后，我偶然发现了有关输入设备udev和systemd-logind注册输入设备的日志消息。如您所见，在实时模式下一切都正常，但在已安装的操作系统上会记录这些错误：
systemd-logind: failed to take device /dev/input/event7: Invalid argument
xf86OpenSerial: Cannot open device /dev/input/event7
Wacom HID 5020 Pen: Error opening /dev/input/event7 (Permission denied)
日志消息按降序排列（GNOME 日志查看器显示它们并按原样保存）：
用户@安装
13:13:21 gdm-x-session: (II) UnloadModule: "wacom"
13:13:21 gdm-x-session: (EE) PreInit returned 8 for "Wacom HID 5020 Pen"
13:13:21 gdm-x-session: (EE) Wacom HID 5020 Pen: Error opening /dev/input/event7 (Permission denied)
13:13:21 gdm-x-session: Permission denied.
13:13:21 gdm-x-session: (EE) xf86OpenSerial: Cannot open device /dev/input/event7
13:13:21 gdm-x-session: (**) Option "Device" "/dev/input/event7"
13:13:21 gdm-x-session: (**) Wacom HID 5020 Pen: always reports core events
13:13:21 gdm-x-session: (II) Using input driver 'wacom' for 'Wacom HID 5020 Pen'
13:13:21 gdm-x-session: (EE) systemd-logind: failed to take device /dev/input/event7: Invalid argument
13:13:21 gdm-x-session: usb:17ef:6004 {omitted}
13:13:21 gdm-x-session: (II) wacom: Driver for Wacom graphics tablets: PenPartner, Graphire,
13:13:21 gdm-x-session: ABI class: X.Org XInput driver, version 22.1
13:13:21 gdm-x-session: Module class: X.Org XInput Driver
13:13:21 gdm-x-session: compiled for 1.18.0, module version = 0.32.0
13:13:21 gdm-x-session: (II) Module wacom: vendor="X.Org Foundation"
13:13:21 gdm-x-session: (II) Loading /usr/lib64/xorg/modules/input/wacom_drv.so
13:13:21 gdm-x-session: (II) LoadModule: "wacom"
13:13:21 gdm-x-session: (**) Wacom HID 5020 Pen: Applying InputClass "Wacom class"
13:13:21 gdm-x-session: (**) Wacom HID 5020 Pen: Applying InputClass "Wacom USB device class"
13:13:21 gdm-x-session: (**) Wacom HID 5020 Pen: Applying InputClass "evdev tablet catchall"
13:13:21 gdm-x-session: (II) config/udev: Adding input device Wacom HID 5020 Pen (/dev/input/event7)