XPost: linux.debian.bugs.dist   
   From: hibbsncc1701@gmail.com   
      
   Package: src:linux   
   Version: 6.12.63-1   
   Severity: normal   
   X-Debbugs-Cc: debian-amd64@lists.debian.org, hibbsncc1701@gmail.com   
   User: debian-amd64@lists.debian.org   
   Usertags: amd64   
      
   Dear Maintainer,   
      
   Attempting to use wacom_serial4 with my Digitizer II fails. Upon running   
   `inputattach --wacom_iv /dev/ttyUSB0` The kernel log outputs:   
   ========   
   [28183.580724] usb 8-2: reset full-speed USB device number 2 using ohci-pci   
   [28183.762333] keyspan 8-2:1.0: Keyspan 1 port adapter converter detected   
   [28183.762737] usb 8-2: Keyspan 1 port adapter converter now attached to   
   ttyUSB0   
   [28204.140559] serio: Serial port ttyUSB0   
   [28204.159732] wacom_serial4 serio2: probe with driver wacom_serial4 failed   
   with error -1   
   ========   
      
   No input devices are made and applications can't see the tablet.   
      
   As this device uses 9600 baud, I've also tried using `inputattach --baud 9600   
   --wacom_iv /dev/ttyUSB0` and got the same result.   
      
   Attempting to follow the instructions at: https://wiki.debian.org/WacomArtPadII   
      
   does not work. This is because the upstream xf86-input-wacom project removed   
   support for the serial backend in 2022. See also:   
   https://github.com/linuxwacom/xf86-input-wacom/issues/197   
   and   
   https://github.com/whot/xf86-input-   
   wacom/commit/4fe24547861fa38548f20e5a0bc1f79b5576d8a0   
      
   The tablet and tty device themselves were verified to be working by:   
   1) Running `inputattach --dump /dev/ttyUSB0` and seeing valid data from the   
   tablet.   
      
   2) Attaching the tablet's tty device to a Windows XP guest VM under VirtualBox,   
   (VirtualBox's serial passthrough mode), and installing the Windows driver in   
   the VM.   
      
   I've also attempted to use isdv4-serial-debugger, but it simply cannot get a   
   response from the device, and outputs a timeout error. Looking at it's source   
   code, I don't see how it's supposed to work, as it's seemingly using invalid   
   commands to reset the device. According to the wacom_serial4 driver   
   (linux-6.12.63/drivers/input/tablet/wacom_serial4.c:L119), the reset to command   
   IV mode string is "\r#", but isdv4-serial-debugger uses "&" for this purpose   
   (xf86-input-wacom-1.2.3/include/isdv4.h:L28). The device id string in   
   isdv4-serial-debugger also seems to be wrong:   
   (linux-6.12.63/drivers/input/tablet/wacom_serial4.c:L116), the query version   
   string is "~#", but isdv4-serial-debugger uses "*" for this purpose   
   (xf86-input-wacom-1.2.3/include/isdv4.h:L27). Perhaps this is due to the   
   removal of serial support from xf86-input-wacom?   
      
   It would be nice if there was someway to get this tablet working under Debian   
   natively again.   
      
   -Patrick Hibbs   
      
      
   -- Package-specific info:   
   ** Version:   
   Linux version 6.12.63+deb13-amd64 (debian-kernel@lists.debian.org)   
   (x86_64-linux-gnu-gcc-14 (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for   
   Debian) 2.44) #1 SMP PREEMPT_DYNAMIC Debian 6.12.63-1 (2025-12-30)   
      
   ** Command line:   
   BOOT_IMAGE=/vmlinuz-6.12.63+deb13-amd64 root=UUID=9b7a4eea-5316-   
   e76-b03a-4f8729009dad ro quiet   
      
   ** Tainted: POE (12289)   
    * proprietary module was loaded   
    * externally-built ("out-of-tree") module was loaded   
    * unsigned module was loaded   
      
   ** Kernel log:   
   Unable to read kernel log; any relevant messages should be attached   
      
   ** Model information   
   sys_vendor: MSI   
   product_name: MS-7641   
   product_version: 5.0   
   chassis_vendor: MSI   
   chassis_version: 5.0   
   bios_vendor: American Megatrends Inc.   
   bios_version: V25.1   
   board_vendor: MSI   
   board_name: 760GMA-P34(FX) (MS-7641)   
   board_version: 5.0   
      
   ** Configuration for modprobe:   
   blacklist microcode   
   blacklist arkfb   
   blacklist aty128fb   
   blacklist atyfb   
   blacklist radeonfb   
   blacklist cirrusfb   
   blacklist cyber2000fb   
   blacklist kyrofb   
   blacklist matroxfb_base   
   blacklist mb862xxfb   
   blacklist neofb   
   blacklist pm2fb   
   blacklist pm3fb   
   blacklist s3fb   
   blacklist savagefb   
   blacklist sisfb   
   blacklist tdfxfb   
   blacklist tridentfb   
   blacklist vt8623fb   
   blacklist nouveau   
   install nvidia modprobe -i nvidia-current $CMDLINE_OPTS   
   install nvidia_modeset modprobe nvidia ; modprobe -i nvidia-current-modeset   
   $CMDLINE_OPTS   
   install nvidia_drm modprobe nvidia-modeset ; modprobe -i nvidia-current-drm   
   $CMDLINE_OPTS   
   install nvidia_uvm modprobe nvidia ; modprobe -i nvidia-current-uvm   
   $CMDLINE_OPTS   
   install nvidia_peermem modprobe nvidia ; modprobe -i nvidia-current-peermem   
   $CMDLINE_OPTS   
   remove nvidia modprobe -r -i nvidia-drm nvidia-modeset nvidia-peermem   
   nvidia-uvm nvidia   
   remove nvidia_modeset modprobe -r -i nvidia-drm nvidia-modeset   
   options snd_pcsp index=-2   
   options cx88_alsa index=-2   
   options snd_atiixp_modem index=-2   
   options snd_intel8x0m index=-2   
   options snd_via82xx_modem index=-2   
   options bonding max_bonds=0   
   options dummy numdummies=0   
   options ifb numifbs=0   
      
   ** Loaded modules:   
   wacom_serial4   
   serport   
   ntfs3   
   ses   
   enclosure   
   scsi_transport_sas   
   uas   
   usb_storage   
   vhost_net   
   vhost   
   vhost_iotlb   
   tap   
   uinput   
   uhid   
   rfcomm   
   cmac   
   algif_hash   
   algif_skcipher   
   af_alg   
   bnep   
   btusb   
   btrtl   
   btintel   
   btbcm   
   btmtk   
   bluetooth   
   ecdh_generic   
   tun   
   joydev   
   snd_seq_dummy   
   snd_hrtimer   
   snd_seq   
   snd_seq_device   
   xt_CHECKSUM   
   xt_MASQUERADE   
   xt_conntrack   
   ipt_REJECT   
   nf_reject_ipv4   
   xt_tcpudp   
   nft_compat   
   nft_chain_nat   
   nf_nat   
   nf_conntrack   
   nf_defrag_ipv6   
   nf_defrag_ipv4   
   nf_tables   
   libcrc32c   
   bridge   
   stp   
   llc   
   qrtr   
   rfkill   
   vboxnetadp(OE)   
   vboxnetflt(OE)   
   vboxdrv(OE)   
   vhba(OE)   
   binfmt_misc   
   nvidia_drm(POE)   
   drm_ttm_helper   
   ttm   
   drm_kms_helper   
   nvidia_modeset(POE)   
   keyspan   
   ezusb   
   video   
   usbserial   
   nvidia(POE)   
   snd_hda_codec_realtek   
   snd_hda_codec_generic   
   snd_hda_codec_hdmi   
   snd_hda_scodec_component   
   edac_mce_amd   
   snd_hda_intel   
   kvm_amd   
   snd_intel_dspcfg   
   snd_intel_sdw_acpi   
   snd_hda_codec   
   ccp   
   snd_hda_core   
   kvm   
   snd_hwdep   
   snd_pcm   
   irqbypass   
   crct10dif_pclmul   
   snd_timer   
   snd   
   ghash_clmulni_intel   
   soundcore   
   sha512_ssse3   
   sha256_ssse3   
   sha1_ssse3   
   sg   
   aesni_intel   
   gf128mul   
   k10temp   
   fam15h_power   
   crypto_simd   
   cryptd   
   vga16fb   
   wmi_bmof   
   vgastate   
   evdev   
   acpi_cpufreq   
   pcspkr   
   dm_mod   
   msr   
   parport_pc   
   drm   
   ppdev   
   lp   
   parport   
   efi_pstore   
   bfq   
   configfs   
   nfnetlink   
   ip_tables   
   x_tables   
   autofs4   
   ext4   
   crc16   
   mbcache   
   jbd2   
   crc32c_generic   
   hid_generic   
   usbhid   
   hid   
   sr_mod   
   sd_mod   
   cdrom   
   ahci   
   ata_generic   
   xhci_pci_renesas   
   libahci   
   pata_atiixp   
   xhci_pci   
      
   [continued in next message]   
      
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