I am copying a large non-Steam game installation to Steam Deck to avoid network use. When I started, the transfer speed averaged 25 MiB/sec.
Then the Deck went to sleep mid-copy. When I pressed Power to wake it up, the screen came on but was black. When I ssh'd into it and sudo poweroff, it stayed on so I had to hard power-off.
After turning it back on and reenabling DeckMTP, I could resume copying but the speed was averaging 15MiB/sec and later 5 Mib/sec. In the system log a message was being spammed as long as files were copying: [uMTPrd - 10:00:45 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
The Deck is running CachyOS Handheld with kernel version 7.0.5-1-cachyos-deckify
Log
May 12 00:09:27 cachyos-deck PluginLoader[997]: [main][INFO]: Starting Decky version v3.2.3
May 12 00:09:27 cachyos-deck PluginLoader[997]: [loader][INFO]: plugin_path: /home/deck/homebrew/plugins
May 12 00:09:27 cachyos-deck PluginLoader[997]: [loader][INFO]: import plugins from /home/deck/homebrew/plugins
May 12 00:09:27 cachyos-deck PluginLoader[997]: [loader][INFO]: found plugin: DeckMTP
May 12 00:09:27 cachyos-deck PluginLoader[997]: [loader][INFO]: Loaded DeckMTP
May 12 00:09:37 cachyos-deck PluginLoader[997]: [loader][INFO]: Hot reload enabled
May 12 00:09:42 cachyos-deck PluginLoader[997]: [main][INFO]: Loading Decky frontend!
May 12 00:09:57 cachyos-deck PluginLoader[997]: [updater][INFO]: Updated remote version information
May 12 09:59:43 cachyos-deck PluginLoader[997]: [plugin][WARNING]: Plugin DeckMTP is using legacy method calls. This will be removed in a future release.
May 12 09:59:47 cachyos-deck PluginLoader[2966]: ./start.sh: line 7: echo: write error: No such device
May 12 09:59:47 cachyos-deck PluginLoader[2966]: ./start.sh: line 8: echo: write error: Device or resource busy
May 12 09:59:47 cachyos-deck PluginLoader[2969]: mkdir: cannot create directory ‘cfg’: File exists
May 12 09:59:47 cachyos-deck PluginLoader[2981]: mkdir: cannot create directory ‘/etc/umtprd’: File exists
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] uMTP Responder
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Version: v1.6.9 compiled Aug 6 2025@17:26:26
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] (c) 2018 - 2025 Viveris Technologies
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Add storage Home - Root Path: /home/deck - UID: 1000 - GID: 1000 - Flags: 0x00000000
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Device path : /dev/ffs-mtp/ep0
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB In End point path : /dev/ffs-mtp/ep1
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Out End point path : /dev/ffs-mtp/ep2
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Event End point path : /dev/ffs-mtp/ep3
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Max packet size : 0x200 bytes
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Max write buffer size : 0x2000 bytes
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Max read buffer size : 0x2000 bytes
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Read file buffer size : 0x100000 bytes
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Manufacturer string : Valve
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Product string : Steam Deck
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Serial string : FWAA2471B094
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Firmware Version string : Rev A
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Interface string : MTP
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Vendor ID : 0x28DE
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Product ID : 0x3000
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB class ID : 0x06
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB subclass ID : 0x01
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Protocol ID : 0x01
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Device version : 0x3008
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB FunctionFS Mode
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Wait for connection : 0
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Loop on disconnect : 1
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Show hidden files : 1
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] File creation umask : System default umask
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Default UID : 1000
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Default GID : 1000
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] inotify : no
May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Sync when close : no
May 12 10:00:24 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:00:24 - Error] incoming_packet : Read Error (-1)!
May 12 10:00:45 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:00:45 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:03:07 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:03:07 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:06 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:06 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:07 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:07 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:08 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:08 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:08 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:08 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:09 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:09 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:09 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:09 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:10 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:10 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:11 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:11 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:11 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:11 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:12 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:12 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
May 12 10:06:12 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:12 - Warning] stat64(/home/deck/.steampath) error: No such file or directory
(and so on for as long as files are transferring)
I am copying a large non-Steam game installation to Steam Deck to avoid network use. When I started, the transfer speed averaged 25 MiB/sec.
Then the Deck went to sleep mid-copy. When I pressed Power to wake it up, the screen came on but was black. When I ssh'd into it and
sudo poweroff, it stayed on so I had to hard power-off.After turning it back on and reenabling DeckMTP, I could resume copying but the speed was averaging 15MiB/sec and later 5 Mib/sec. In the system log a message was being spammed as long as files were copying:
[uMTPrd - 10:00:45 - Warning] stat64(/home/deck/.steampath) error: No such file or directoryThe Deck is running CachyOS Handheld with kernel version 7.0.5-1-cachyos-deckify
Log
May 12 00:09:27 cachyos-deck PluginLoader[997]: [main][INFO]: Starting Decky version v3.2.3 May 12 00:09:27 cachyos-deck PluginLoader[997]: [loader][INFO]: plugin_path: /home/deck/homebrew/plugins May 12 00:09:27 cachyos-deck PluginLoader[997]: [loader][INFO]: import plugins from /home/deck/homebrew/plugins May 12 00:09:27 cachyos-deck PluginLoader[997]: [loader][INFO]: found plugin: DeckMTP May 12 00:09:27 cachyos-deck PluginLoader[997]: [loader][INFO]: Loaded DeckMTP May 12 00:09:37 cachyos-deck PluginLoader[997]: [loader][INFO]: Hot reload enabled May 12 00:09:42 cachyos-deck PluginLoader[997]: [main][INFO]: Loading Decky frontend! May 12 00:09:57 cachyos-deck PluginLoader[997]: [updater][INFO]: Updated remote version information May 12 09:59:43 cachyos-deck PluginLoader[997]: [plugin][WARNING]: Plugin DeckMTP is using legacy method calls. This will be removed in a future release. May 12 09:59:47 cachyos-deck PluginLoader[2966]: ./start.sh: line 7: echo: write error: No such device May 12 09:59:47 cachyos-deck PluginLoader[2966]: ./start.sh: line 8: echo: write error: Device or resource busy May 12 09:59:47 cachyos-deck PluginLoader[2969]: mkdir: cannot create directory ‘cfg’: File exists May 12 09:59:47 cachyos-deck PluginLoader[2981]: mkdir: cannot create directory ‘/etc/umtprd’: File exists May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] uMTP Responder May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Version: v1.6.9 compiled Aug 6 2025@17:26:26 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] (c) 2018 - 2025 Viveris Technologies May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Add storage Home - Root Path: /home/deck - UID: 1000 - GID: 1000 - Flags: 0x00000000 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Device path : /dev/ffs-mtp/ep0 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB In End point path : /dev/ffs-mtp/ep1 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Out End point path : /dev/ffs-mtp/ep2 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Event End point path : /dev/ffs-mtp/ep3 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Max packet size : 0x200 bytes May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Max write buffer size : 0x2000 bytes May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Max read buffer size : 0x2000 bytes May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Read file buffer size : 0x100000 bytes May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Manufacturer string : Valve May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Product string : Steam Deck May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Serial string : FWAA2471B094 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Firmware Version string : Rev A May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Interface string : MTP May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Vendor ID : 0x28DE May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Product ID : 0x3000 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB class ID : 0x06 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB subclass ID : 0x01 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Protocol ID : 0x01 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB Device version : 0x3008 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] USB FunctionFS Mode May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Wait for connection : 0 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Loop on disconnect : 1 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Show hidden files : 1 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] File creation umask : System default umask May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Default UID : 1000 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Default GID : 1000 May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] inotify : no May 12 09:59:47 cachyos-deck PluginLoader[2984]: [uMTPrd - 09:59:47 - Info] Sync when close : no May 12 10:00:24 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:00:24 - Error] incoming_packet : Read Error (-1)! May 12 10:00:45 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:00:45 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:03:07 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:03:07 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:06 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:06 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:07 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:07 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:08 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:08 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:08 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:08 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:09 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:09 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:09 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:09 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:10 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:10 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:11 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:11 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:11 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:11 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:12 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:12 - Warning] stat64(/home/deck/.steampath) error: No such file or directory May 12 10:06:12 cachyos-deck PluginLoader[2984]: [uMTPrd - 10:06:12 - Warning] stat64(/home/deck/.steampath) error: No such file or directory (and so on for as long as files are transferring)