Running dmesg after plugging my POS-5890K labelled usb thermal receipt
printer, it identifies itself as
full-speed USB device number 9 using ehci-pci
Mfr=1, Product=2, SerialNumber=3
Product: POS58 USB Printer
Manufacturer: GD32 Microelectronics
I found the hard way that these printers are not supported by CUPS by
default ... one has to go the extra length to either send esc/p codes
manually via your own app
...or compile a driver from source, just like 20 years ago for some
printers... maybe 2018 will be the year of desktop linux *sarcasm*
I've tried this driver and it didn't work...
(the driver source was fetched by git from its current github repo, so
it's not out of date, it's in fact newer than the above blog post)
What gives more clues is the small piece of thermal paper that came
with the printer with a printout of its self-test (surely from
58-IV-U Thermal Printer
Revised date: 06-Jan-2017
Command Standard: EPSON (ESC/POS)
Print mode: Normal mode & Hex Mode
Print method: Line Thermal
Print width: 384 dots/line
Print speed: 90 mm/s
Chinese Mode: NO
Print density: Level3
Interface Type: USB
Current Character: Chinese (GB18030)
Code Page: 0: OEM437 (Std.Europe)
I wonder why the CUPS folks have not released a generic “EPSON
ESC/POS” printer driver where the above parameters can be tweaked and
The driver mentioned above was compiled, and installed but didn’t
work. A sample print gave gibberish. A second text-only printing (by
clicking the CUPS “print self-test page” read “IF YOU CAN READ THIS
YOU’RE USING THE WRONG DRIVER FOR YOUR PRINTER”.
A crude bug-finding code it seems…
Any ideas before I head over to the CUPS maling list and pull my hair?
For instance, this blog post
talks about using "usblp" but commenters say "usblp" was deprecated
(already in 2015)
So what does replace usblp?
And look, here someone else also pulling his hair.
FFS, a line printer was the first type of printer, back in the days of
RS232 ports. If we can't get a USB line printer detected and
configured and send ASCII to it, we're doomed. All because there's a
dozen poorly documented layers of software crap obscuring it...
I had to get a new laptop, and it came with a Toshiba MQ01ABD100 drive.
To disable the Advanced Power Management and to stop the head
unload/clicking I've always used:
hdparm -B 255 /dev/sda
But on this machine/drive, it doesn't seem to work;
or at least it only works for a short while, and then it starts unloading
More importantly, the next time I try to disable it,it says its disabled,
but the drive carries on clicking, and the Load_Cycle_Count still keeps
Early last month, I upgraded from f25 to f26. I'm using LibreOffice
Build ID: 18.104.22.168-4.fc26
CPU Threads: 8; OS Version: Linux 4.13; UI Render: default; VCL: gtk3;
Layout Engine: new;
Locale: en-US (en_US.utf8); Calc: group
The graphics card is "GeForce GTX 660/PCIe/SSE2".
I last patched the system ("dnf upgrade") this past Thursday.
Since upgrading to f26, I've been seeing something shifty in Impress.
The text in text boxes has shifted about 2 millimeters (about 1/16 inch)
relative to geometric objects (lines, rectangles, etc.). The text is
shifted up and left relative to the geometric objects (or the geometric
objects has shifted down and right; I can't determine which!).
1. In already existing Impress files, how do I either select all text
boxes at the same time, or select all graphic objects (but not text
boxes) at the same time so I can nudge them back appropriately to the
correct positions relative to each other?
2. What's the real problem, and how do I fix that?
Thank-you in advance.
I lost the host Fedora25 when the Virtual machine(win7) was off.
I installed Fedora 25 on a new 1TB disk. Now I can mount the old root
and home on the new Fedora25. How to recover the win7 guest machine?
$ uname -a
Linux localhost.localdomain 4.13.15-100.fc25.x86_64 #1 SMP Tue Nov 21
22:45:32 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Please help me. Thanks.
I'm running a Fedora Cloud Base 27 instance in openstack and ssh using the 'fedora' user works fine, and I can sudo without a password. However, if I add a new user 'foobar' and add this user to the wheel group, this user needs a password in order to use sudo. This makes sense based on the config in /etc/sudoers which has '%wheel ALL=(ALL) ALL'. But I'm wondering how is the 'fedora' user configured so that it's in the same wheel group and can sudo without a password?
I've been running Fedora since the Fedora Core days. About 11 days
ago, I upgraded my x86_64 system from 25 to 26. Prior to upgrading to
26, I was running 25 for over 6 months without any stability issues.
Since the upgrade to 26, something inspecting the process list is
wedging the OS. The problem isn't even obvious until I happen to run
'ps' and the command hangs indefinitely, and can't be killed.
However, at that point, the load avg takes off, and just keeps
climbing over time. The system is still mostly responsive, but
clearly its very unhappy about something. I'm able to check 'dmesg'
as well as /var/log/messages while its in the bad state, and there's
nothing new in either, and definitely nothing bad, unusual or
suspicious. Unfortunately, I can't even shutdown/reboot gracefully at
this point, as anything & everything that wants to inspect the process
list also hangs, and so the system never fully shuts down (I waited a
full hour the first time hoping that eventually it would proceed). I
have to hit RESET and then (thankfully) the system boots up just fine
The first hang happened about 28 hours after upgrading to 26. Things
were fine after that for just over 9 days of uptime when the same
thing happened all over again.
I've tried googling to see if there's any one else running into this,
and didn't find much. This was the closest thing, but its over a year
At this point, I'm wondering whether anyone:
0) recognizes this as a known bug
1) has any ideas how to debug it further
I have a dual head configuration with an Nvidia graphic card, which
perfectly works. but the monitors are standard ones (LG, resolution:
1280x1024) and I would like to add a monitor for treating my photos with
I am wondering if I could add another graphic card in order to have a
third monitor with an HD resolution (1920x1080 or more) and a specific
If yes, is there some documentation to configure my fedora?
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