Known Issues with Red Hat Enterprise Linux 7.x

This article lists common problems and possible solutions or workarounds that have been reported with Linux@IBM Red Hat Enterprise Linux (RHEL) 7.x. Unless otherwise specified, items apply to all versions of Linux@IBM RHEL7.

 

Last Updated	Description	Workaround
15 January 2020	Lenovo P50 fails to resume from suspend or hibernate on Linux@IBM 7.7.	To fix this: Open a terminal, type sudo nano /etc/default/grub, and enter your user password when prompted. Add nouveau.nomodeset=0 to the GRUB_CMDLINE_LINUX line. For example: GRUB_CMDLINE_LINUX="vconsole.font=latarcyrheb-sun32 rhgb quiet vconsole.keymap=de,us nouveau.nomodeset=0" Press Ctrl-o to save the file, and press Enter to confirm the file name. Press Ctrl-x to close the editor. Run sudo grub2-mkconfig -o /boot/grub2/grub.cfg in the terminal. Reboot your system.
9/12/2019	SMB file sharing between a Windows 10 KVM and the Linux doesn't work on Linux@IBM RHEL 7.7.	To fix this: Launch Terminal. Issue the command sudo yum remove sssd-libwbclient to remove this software package.
9/12/2019	Windows 10 KVM fails to start with a "preparing Windows" message.	To be able to start Windows 10 you must disconnect the network connection on the Linux host and start Windows 10 again: Remove opentext socks in Windows 10. Shut down Windows 10. Start the network in Linux again. Start Windows 10 and reinstall opentext socks.
8/1/2019	Lenovo P52 kernel panic.	Lenovo P52 requires BIOS Display setting to Discrete (not Hybrid). Restart the P52 and press the F1 key when the Lenovo boot logo appears. In the BIOS settings, use the cursor keys to select Config, then Display. Set the Graphics device to Discrete. Save and exit.
8/1/2019	Lenovo M920 doesn't work in discrete video mode.	Lenovo M920 requires the use of integrated Intel video (VGA). Discrete Nvidia video via the PCI adapter (developer models) is not supported.
7/24/2019	No mouse pointer after installing the Citrix Workspace App in a Windows 10 KVM.	To fix this: Open Virt-manager and shut down the Windows KVM. Right-click the Windiows KVM and select Open. Click the light bulb icon (). Select Display Spice. Change the Type from "Spice server" to "VNC server" and click Apply. Start the Windows 10 KVM. From the Windows 10 desktop, press the Windows+x keys and start the Device Manager. Open Display adapters, right-click Citrix Indirect Display Adapter, and select Disable Device. Power down the Windows 10 KVM. Repeat steps 2 through 4. Change the Type from "VNC server" back to "Spice server" and click Apply. Start the Windows 10 KVM.
7/22/2019	Cisco Jabber doesn't work on Linux.	Jabber works on MacOS, Windows, Android and iOS, but it doesn't run on Linux. Linux users can use Jabber in a Windows KVM, but only when base O/S (Linux ) is connected via wired Ethernet, and the virtual network bridge has been changed from "NAT" to "macvtap " in the KVM. Open Virt-manager and shut down the Windows KVM. Right-click the Windiows KVM and select Open. Click the light bulb icon (). Select NIC.xx.xx.xx.  Change "Network source" to "Host device enp.......:  macvtap." Click Apply. Start your Windows KVM.
4/24/2019	Win10 KVM fails to boot on AMD Ryzen hardware ,	Power down the Windows 10 KVM. Open Terminal and become root user using the sudo -s command. Issue the command virsh edit --domain Virtual_Client_Windows_10-KVM (You can use the Tab key for autocompletion.) Find the section that starts with “<cpu mode.... and ends with “</cpu>” Replace this section with the following: <cpu mode=‘custom’ match=‘exact’check=‘partial’> <model fallback=‘allow’> Opteron_G5 </model> < topology sockets=‘1’ cores=‘4’ threads=‘1’> <feature policy=‘disable’ name=‘xop’/> <feature policy=‘disable’ name=‘fma4’/> <feature policy=‘disable’ name=‘tbm’/> </cpu> Save the changes and start the Windows 10 KVM from the virt-manager.
4/24/2019	Realtek R8169 Network driver crashing.	This issues can be seen on the Lenovo A485 and has been addressed by Red Hat. The network should recovery automatically after the crash.
4/24/2019	Message states that an AMD Processor hasn't undergone testing by Red Hat and might not be certified.	This message is harmless, but Red Hat is working to fix this.
4/24/2019	Krnel mesage "do_IRQ: 7.55 No irq handler for vector (irq -1)"	This message is harmless, but Red Hat is working to fix this.
4/12/2019	Connectivity problems when using OpenText Socks from a Windows KVM.	The setting for "other" traffic in OpenText socks needs to be set to "direct" instead of "socksify."
4/12/2019	Web applications that are Java-based no longer work.	Web browsers on Linux no longer allow the Java plugin to work. The workaround is to use Firefox in a Windows KVM.
3/8/2019	Remmina isn't able to establish RDP (Remote Desktop Protocol) connection to Windows host.	1. Make sure to use the latest available Remmina version from the official software repository. 2. From Advanced Options enable Relax Order Checks and Glyph Cache.
2/27/2019	Problems with P50 display after upgrade to Linux@IBM 7.6.	Set video mode in the BIOS to "discrete" and/or remove custom configuration files from /etc/X11/xorg.conf.d/
2/27/2019	Firefox doesn’t start after upgrade to Linux@IBM 7.6.	Open Terminal and run the following command: sudo alternatives --remove libjavaplugin.so.x86_64 /usr/lib/jvm/jre-1.8.0-oracle-1.8.0.191-1jpp.1.el7.x86_64/lib/amd64/libnpjp2.so
2/27/2019	Display issues on W5xx models after upgrade to Linux@IBM 7.6.	Open Terminal and run the following command: sudo rm /etc/X11/xorg.conf.d/21-nouveau.conf Then reboot the system.
2/27/2019	HOD jws SSL connection fails with “presented a certificate that was not trusted" after upgrade to Linux@IBM 7.6.	Use HOD “applet” version (white icon) as an alternative.
2/27/2019	Network Connections not visible from Gnome drop-down menu after upgrade to Linux@IBM 7.6. Not able to start Wi-Fi or SAS VPN from GUI.	Left click in the upper right corner of the desktop and select the tools icon from the bottom of the drop-down menu. Select Network from the next dialog and start Wi-Fi and/or SAS VPN from there.
2/27/2019	Remmina not connecting to Windows Server 2012 after upgrade to Linux@IBM 7.6	Use XFreeRDP as an alternative.
2/27/2019	Problems to Suspend/Hibernate or on Resume.	Update the computer's BIOS.
1/22/2019	After attaching a USB headset, pointer devices (e.g., mouse, trackpad, touchpad) become unresponsive.	Connect the headset to the laptop's audio input/output port directly instead of using USB.
1/17/2019	The package update fails because of a gnome-screensaver package dependency problem when the EPEL software repository is enabled on Linux@IBM 7.5. Error: Package: gnome-screensaver-3.6.1-20.el7.x86_64 (epel) Requires: libgnome-desktop-3.so.17()(64bit)	Either upgrade to 7.6 as soon as it becomes available or disable the EPEL software repository.
12/19/2018	Migrating from KeepassX version 1 to version 2.	Be aware when switching to the new version that: keepassx2 doesn't update the keepassx database. Password info stored in keepassx doesn't migrate to keepassx2.
9/5/2018	Booting the installation media fails on some ThinkPad and USB thumb drive combinations. For example, the Lenovo P50 might fail with some SanDisk thumb drives.	Try a USB thumb drive from a different vendor.
8/31/2018	After booting from the Linux@IBM 7 installation media and starting the installation, the installer may fail to create the partitions on the disk.	To erase the partitions from a previous Linux installation manually, then restart the installation: After the installer fails, right-click on the Desktop and select Open Terminal. Enter the command lsblk -S to list all available disks. The internal disk will most likely be "sda." Enter the following command: dd if=/dev/zero of=/dev/sda bs=100M count=10 Restart the installation.
8/1/2018	Permission issues when copying files to an external drive as root under RHEL6 and then trying to recover them under RHEL7.	If files from the backup have been copied as the root user to the regular users home directory, this can be fixed either by changing the permission for each file or by using the command below.  This command changes the user/group owner from root to your regular user for all files in your home directory. It doesn't  touch hidden directories in your home directory.   sudo find /home/$USER/ -not -path '*/.*/*' -user root -exec chown $USER: {} \; Important: Copy and paste this command to avoid errors.
5/17/2018	In Linux@IBM RHEL7.5 on the Lenovo w530, resuming from suspend might fail with a blank screen.	There are currently no workarounds.
5/17/2018	In Linux@IBM RHEL7.5, there are several Lenovo T480 issues. Mic mute function key (Fn+F4) doesn't work. 32GB developer model intermittently hangs during shutdown or resume from suspend.	There are currently no workarounds.
5/17/2018	In Linux@IBM RHEL7.5, Windows KVMs might stop responding to the keyboard or mouse after locking and unlocking the Linux host.	The current workarounds can be used until the problem is fixed by Red Hat: Option A: Enter full screen in the KVM then leave full screen. Option B: Switch to View->Details and then switch back to View->Console. Option C:  Install virt-viewer by entering the command sudo yum install virt-viewer in a Terminal window. After virt-viewer is installed, run the command remote-viewer spice://localhost:5900 to connect to the KVM.
2/19/2018	Shared folder in Windows 10 KVM isn't working after update to Redstone 3 (Version 1709)	Install the Windows 10 KVM update and reboot the KVM. If this doesn't fix the problem, run the command C:\Program Files (x86)\Virtio Win 10\Utilities\fixhost.exe
2/9/2018	No Sound in KVM or other application.	From the Activities menu, search for "sound" and click the Sound icon. Select the Applications tab from the sound dialog and make sure the virt-manager or the other application isn't muted. If this doesn't help, shut down the KVM or close the application, open a terminal and run the command: rm ~/.config/pulse/*stream-volumes.tdb && pulseaudio -k Restart the KVM and check sound volume in the sound dialog again. KVM only: If there is still no sound in the KVM, shut down all KVMs, open a Terminal window and run the command: sudo systemctl restart libvirtd Restart the KVM and check sound volume in the sound dialog again.
2/8/2018	After several problems related to Touch support on T460/T470 models, such as locked mouse buttons, Touch is being disabled by default for now. Touch support is disabled on T460 and T470 only, but It is still enabled on Carbon X1.	To re-enable Touch support,  open a Terminal window, run the following commands, and then restart your computer: sudo rm /etc/X11/xorg.conf.d/disable-touchscreen.conf sudo touch /etc/sysconfig/enable-touchscreen
11/20/2017	On Linux@IBM 7.4 it isn't possible to accept a Sametime multi-party chat invitation. This will make Sametime hang.	Open Preferences in Sametime and select Notifications. Scroll down the list on the right and select Multi-party chat. Check "Bring new invitation to front."
11/13/2017	On Linux@IBM 7.4 the Welcome or the Go Virtual App might show a blank window.	Try issuing the following commands from a Terminal window: 1. rm -rf ~/.local/share/mime/packages 2. mkdir ~/.local/share/mime/packages 3. update-mime-database ~/.local/share/mime 4. touch ~/.update-mime-cache-7.4 Then start the Welcome App or the Go Virtual App again.
11/13/2017	On Linux@IBM 7.4 left handed mouse users can't switch the primary mouse button from from left to right.	1. Open a Terminal window. 2. Run the command      sudo yum -y install xorg-x11-drv-libinput This will install a few software packages. 3. Reboot the computer. 4. Go to Activities and  search for "mouse."  Click the Mouse & Touchpad icon and change settings for the primary mouse button.
11/13/2017	On Linux@IBM 7.4 there are fewer available display resolutions.	If your preferred display resolution is missing do this: 1. Open a Terminal window 2. Issue the xrandr command and get the name of the build-in display. On a T460 it is  eDP-1 . 3. Issue the following command, adjusting the scale value for the X and Y axis according to your needs. $xrandr --output eDP-1 --scale 0.75x0.75
11/13/2017	The upgrade from Linux@IBM 7.3 to version 7.4 might lead to a kernel boot failure. To avoid this read  Upgrade to Linux@IBM 7.4 before performing the upgrade.	If your system doesn't boot the default kernel after doing the upgrade: 1. Boot failsafe kernel. 2. Open a Terminal window. 3. Issue the command sudo -s 4. Issue the command /opt/ibm/c4eb/openclient-upgrade/fix-dupes.sh   This might take a while. 5. Display installed kernels by using  the command  rpm -qa kernel 6. Issue the  yum reinstall the latest available kernel. For example, yum reinstall kernel-3.10.0-693.5.2.el7.x86_64. 7. Use the Gnome Tweak tool to enable all available extensions. From Activities  search for tweak and click Tweak tool.
10/9/2017	When using Cisco AnyConnect to connect the Linux@IBM 7.x host to the IBM intranet, a Windows or Linux virtual client (KVM) will have no connection to the IBM intranet.	If you need IBM intranet access in the KVM, you must connect the Linux host to the IBM intranet using OpenConnect (for example, a SAS VPN using the Network-Manager), not Cisco AnyConnect.
9/13/2017	After or during installation, you might end with a root filesystem having a size of only 50GB.	To solve the problem open a terminal and copy/paste the command below to the terminal and press Enter. Enter your user password when prompted. sudo lvresize --resizefs -l +100%FREE /dev/mapper/$(lsblk -l | grep lv_root | cut -d' ' -f1)
8/18/2017	Firefox can experience problems such as no sound or choppy video playback.	In case of problems with the Firefox browser and certain web sites, try the Google Chrome browser instead. Examples of sites experience problems are some Softskill courses that lack audio in Firefox but work fine in Chrome.
08/16/2017	T470 CPU fan intermittently runs at 100% after resuming from suspend.	This problem causes slightly-decreased battery run time and an increase in noise while the fan is at 100%. To solve this situation, power off the T470 and do a cold restart. The problem is under investigation by Red Hat.
07/18/2017	Shutdown/Restart host fails while virtual machine is running and the virtual machine window has the focus.	As long as a virtual machine is running and the window of the virtual machine has the focus (is the top most window of your desktop), any attempt to shut down or restart the Linux host will fail. Make sure to shut down the virtual machine first, before shutting down and restarting of the Linux host.
04/13/2017	Memtest crashes when moving the mouse.	Moving the mouse while Memtest is running on the Lenovo P50 will make Memtest crash. As a workaround either disable USB UEFI BIOS Support in the BIOS or avoid touching the Touchpad or Trackpoint while Memtest is running. Enable USB UEFI BIOS Support after using Memtest again.
03/07/2017	Hibernate host while virtual machine is running.	Before you hibernate your computer, any running virtual machines must be saved. After resuming the computer you must restore the virtual machines. To save a virtual machine, from the Virtual Machine menu select Shut Down, and click Save. An alternative way is a right-click on the entry for the virtual machine, select Shut Down and Save from the Virt-Manager. After resuming the Linux host, click the Play icon from the virtual machine window or right-click on the entry for the virtual machine and select Restore from the Virt-Manager.
02/17/2017	Following an upgrade from RHEL 7.2 to 7.3, WST reports "Open Client RHEL 7 4.20 is not permitted for use."	ISAM and WST are not aware of the new OS version until it performs its next full scan. You can force this to run immediately by right-clicking on ISAM in the system tray and selecting "Full Scan and Registration."
02/17/2017	In Sametime there are icons truncated on the preferences menu.	There is no workaround and this won't be fixed by IBM.
02/13/2017	IBM Notes doesn't recognize a VPN/Power9 connection when it's started before establishing this connection.	The correct order is to establish the connection first and then start Notes. If you started them in the wrong order already, leave the VPN/Power9 connection open but close and restart Notes.
12/23/2016	Stand-alone Samtime 8.5.2 doesn't open Lotus Notes links	Use the embedded Sametime.
12/19/2016	Remmina freezes Gnome Desktop when keyboard grabbing enabled.	Don't use keyboard grabbing in Remmina.
09/27/2016	Problems after Selinux policy update.	After such a policy update, it's known that files like /etc/resolv.conf will receive a wrong file context, resulting in connectivity problems. Check for current policy updates by running the command from a terminal: sudo grep 'selinux' /var/log/yum.log Run the touch /.autorelabel command from a terminal and reboot your system. The Selinux relabeling will be done during the boot phase.
08/23/2016	Accessing external storage media fails.	Accessing an external storage media (disk, thumb drives) that was partitioned/formatted on RHEL6 will fail as a regular user.
08/09/2016	Video issues using RHEL 7.3 on Lenovo P50.	In the P50 BIOS, under Config, Display, there are 2 Graphics Device modes: Hybrid Graphics Discrete Graphics Best practice is to use Hybrid Graphics during the installation of the REHL 7.3 OpenClient. As soon as the installation has finished set graphics to DISCRETE in the BIOS for normal operation. For multi-display configuration: Create /etc/X11/xorg.conf.d/10-device.conf with the following content: Section "Device" Identifier "nvidia card" Option "AccelMethod" "none" EndSection   Brightness control doesn't work on the P50 in discrete graphics mode.
04/19/2016	Spanning the Win7 KVM to multiple screens doesn't work with the virt-manager.	Install virt-viewer. Start the win7 KVM from the virt-manager but don't open it. Open a terminal and run the remote-viewer spice://localhost:5900 command to open the display for the KVM.
01/07/2016	Libre Offiice-send as pdf (per email) doesn't attach pdf to Notes-Email.	In LibreOffice, navigate to Tools, Options, Internet, Email, and then verify "Email program" is blank.
01/04/2016	Docker doesn't work if the Symantec EndPoint Protection AutoProtect kernel module is active or installed. Symantec acknowledges this as a bug to be fixed.	Two possible workaround solutions: 1. Turn off Symantec AutoProtect. $ sudo chkconfig --level 2345 autoprotect off 2. Remove the Symantec AutoProtect RPM $ sudo rpm -e savap-x64 --nodeps Restart computer. Docker should now work. Your computer will be flagged by WST as non-compliant. You will need to apply for an exception.
12/02/2015	A TPM error (6) occurred attempting to read a PCR value during boot.	Harmless error.  To eliminate, disable TPM (Security Chip) in the system bios. The Security Chip might be set to "Inactive" by default, but it needs to be Disabled to eliminate this warning message.
10/21/2015	Function keys on Toshiba laptop models doesn't work (e.g., volume, brightness, wireless, video controls).	Pending Toshiba support for RHEL 7.2.,Toshiba has not committed to supporting RHEL7. No target date at this time.
10/21/2015	W530 doesn't suspend when closing the lid with an external display attached.	Pending fix from Red Hat (Red Hat Case 01351242). Use the command sudo pm-suspend or use the pause button from the menu in the upper right corner of the desktop to suspend the W530.
Working as designed:
10/21/2015	No KVM option for Help and then Install Virtual Client Updates.	Working as designed. Updates will be installed by tools within each KVM.
10/21/2015	No option to install Windows XP or Ubuntu KVMs.	Working as designed. Windows XP and Ubuntu KVMs aren't supported on RHEL7.