after upgrade to 5.8.5-5 on fedora 25 knotes no longer starts in gnome

[Igor A. Nesterov]

I know that this post might be met with skepticism on this list, but I
use a standard Fedora (now 25) with Gnome Shell and rely on multiple
KDE applications because there is no match in Gnome. Today's 'dnf
update' has installed plasma-workspace 5.8.5-5

[root at cougar ~]# dnf history | head
ID     | Command line             | Date and time    | Action(s)      | Altered
-------------------------------------------------------------------------------
    76 | update                   | 2017-02-11 17:24 | Update         |   11   
...

[root at cougar ~]# dnf history info 76
...
Packages Altered:
    Upgraded libkworkspace5-5.8.5-1.fc25.x86_64                    @updates
    Upgrade                 5.8.5-5.fc25.x86_64                    @updates
    Upgrade  libqalculate-0.9.10-3.fc25.x86_64                     @updates
    Upgraded libqalculate-0.9.7-18.fc25.x86_64                     @fedora
    Upgraded libssh-0.7.3-1.fc24.x86_64                            @fedora
    Upgrade         0.7.4-1.fc25.x86_64                            @updates
    Upgraded plasma-lookandfeel-fedora-5.8.5-1.fc25.noarch         @updates
    Upgrade                            5.8.5-5.fc25.noarch         @updates
    Upgraded plasma-workspace-5.8.5-1.fc25.x86_64                  @updates
    Upgrade                   5.8.5-5.fc25.x86_64                  @updates
    Upgraded plasma-workspace-common-5.8.5-1.fc25.x86_64           @updates
    Upgrade                          5.8.5-5.fc25.x86_64           @updates
    Upgraded plasma-workspace-drkonqi-5.8.5-1.fc25.x86_64          @updates
    Upgrade                           5.8.5-5.fc25.x86_64          @updates
    Upgraded plasma-workspace-geolocation-5.8.5-1.fc25.x86_64      @updates
    Upgrade                               5.8.5-5.fc25.x86_64      @updates
    Upgraded plasma-workspace-geolocation-libs-5.8.5-1.fc25.x86_64 @updates
    Upgrade                                    5.8.5-5.fc25.x86_64 @updates
    Upgraded plasma-workspace-libs-5.8.5-1.fc25.x86_64             @updates
    Upgrade                        5.8.5-5.fc25.x86_64             @updates
    Upgraded sddm-breeze-5.8.5-1.fc25.noarch                       @updates
    Upgrade              5.8.5-5.fc25.noarch                       @updates

And after reboot knotes no longer starts in Gnome Shell. It starts
ok if I login to KDE. I tried to debug it, but my knowledge of underhood
KDE application machinery is not enough. Starting knotes from command
line produces this printout

igorn at cougar:/home/igorn>knotes
QSystemTrayIcon::setVisible: No Icon set
QXcbConnection: XCB error: 2 (BadValue), sequence: 435, resource id: 0, major code: 1 (CreateWindow), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 436, resource id: 119537672, major code: 2 (ChangeWindowAttributes), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 437, resource id: 119537672, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 438, resource id: 119537672, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 439, resource id: 119537672, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 441, resource id: 119537672, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 442, resource id: 119537672, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 443, resource id: 119537672, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 447, resource id: 119537672, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 451, resource id: 119537672, major code: 2 (ChangeWindowAttributes), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 452, resource id: 119537672, major code: 18 (ChangeProperty), minor code: 0
....

strace knotes process shows this

igorn at cougar:/home/igorn>strace -p 6286
strace: Process 6286 attached
restart_syscall(<... resuming interrupted poll ...>) = 0
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=16, events=POLLIN}], 4, 9998) = 0 (Timeout)
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=16, events=POLLIN}], 4, 9989) = 0 (Timeout)
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=16, events=POLLIN}], 4, -1) = 2 ([{fd=5, revents=POLLIN}, {fd=7, revents=POLLIN}])
read(5, "\1\0\0\0\0\0\0\0", 16)         = 8
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="U\2\227\0\376\202-\0\3\4\4\0\0\0\0\0\0\0\0\4\4\4\4\4\0\0\3\37%\2\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=7, events=POLLIN}, {fd=11, events=POLLIN}, {fd=16, events=POLLIN}], 4, -1^Cstrace: Process 6286 detached
 <detached ...>

igorn at cougar:/home/igorn>lsof -p 6286
....
knotes  6286 igorn    6u  a_inode               0,11         0    9490 [eventfd]
knotes  6286 igorn    7u     unix 0xffff9e83ba927000       0t0  140013 type=STREAM
knotes  6286 igorn    8u     unix 0xffff9e83b2ae7800       0t0  150258 type=STREAM
....

Is there any way simple way to fix this? 'dnf downgrade' does not work
because of some dependency issue. I feel very sad without my knotes.

Igor