Download |VERIFIED| Hibernation Manager

After installation, it seems that the xcfe4 power manager setting icon is not loaded at startup anymore. Despite this suspend mode seems to work well (After some minutes not using the system, it suspended automatically ). I tought that the time was set in xcfe4-power-manager (despite it not being visible).

The monitor goes into suspend and then switches off correctly. But waiting the 15 minutes (I don't understand why I can't set a time to go in suspend/hibernate mode shorter than 15 minutes) ** the system remains on. When disabling the screensaver the message "power manager not authorized" appears.**

Download Hibernation Manager

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1) Run xcfe4-power-manager and its settings icon at startup in these (alternative) methods: - changing to laptomop mode yes in preferences->lxsession predefined app - adding a line in startup application xcfe4-power-manager --no-daemon

My polkitsettings under/usr/share/polkit-1/actions/org.freedesktop.login1.policyare identical for suspend and hibernate, so it doesn't make much sense whenxfce-power-manager` can't access hibernate options.

"Environment=SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK=1" does make both error messages go away, a Hibernate button appears in my Log Out menu options, and the system appears to try hibernating. The screen locks, but the computer does go into hibernation or suspend. New output is also printed into the XScreensaver screen:

Is there anything in the journal about hibernation?

Did you set the correct resume and resume_offset kernel parameters? Do /sys/power/resume and /sys/power/resume_offset contain the correct values?

I expect it to work, at least as long as hibernation does not involve system firmware. You load another Linux kernel/initrd, it looks for hibernation image and loads it. As long as you did not touch filesystems in between everything should be OK.

The second command is also needed, or for some reason when I resume, there is no login manager, just a black screen with my mouse cursor. My login manager is the lightdm-webkit-theme-aether package in Arch Linux.

I had been using the Windows bootmanager with an entry (added with EasyBCD because I'm lazy) for the GRUB on the Fedora partition. However, using the Windows bootloader as a primary one prevented me from hibernating Windows and then booting into Linux. So I have to use GRUB now.

If the Windows bootloader is first, the very first thing it does before showing the menu is check for a hibernated OS. If a hibernated OS is found, it will boot into it automatically and will not show you a menu to choose boot options from. If you force the menu (i.e. F8), the hibernation data will be deleted.

Now if GRUB is the MBR boot menu and is configured to chainload BOOTMGR or boot into Linux, you can hibernate Windows and boot into Linux - but if you mount the NTFS partition, most likely your hibernation will be lost (detected as corrupted). Basically, if you hibernate a machine, you must not touch any volumes that were mounted on that machine (i.e. any FAT32 or NTFS partitions assigned a drive letter in the hibernated OS).

Ridiculously important note: In the event that you mount (say, in Linux) a Windows partition while Windows is hibernated and you are unlucky enough that when you're done with Linux and attempt to reboot into Windows, Windows does resume from hibernation (instead of erroring out, throwing away hibernation data and attempting a normal boot), you will most likely suffer catastrophic data loss to all Windows partitions as all filesystem-related structures will be out-of-sync between what Windows has loaded in the memory and what's actually written on the disk.

An entity manager factory provides entity manager instances, all instances are configured to connect to the same database, to use the same default settings as defined by the particular implementation, etc. You can prepare several entity manager factories to access several data stores. This interface is similar to the SessionFactory in native Hibernate.

A persistence context is a set of entity instances in which for any persistent entity identity there is a unique entity instance. Within the persistence context, the entity instances and their lifecycle is managed by a particular entity manager. The scope of this context can either be the transaction, or an extended unit of work.

The set of entity types that can be managed by a given entity manager is defined by a persistence unit. A persistence unit defines the set of all classes that are related or grouped by the application, and which must be collocated in their mapping to a single data store.

The most common and widely used entity manager in a Java EE environment is the container-managed entity manager. In this mode, the container is responsible for the opening and closing of the entity manager (this is transparent to the application). It is also responsible for transaction boundaries. A container-managed entity manager is obtained in an application through dependency injection or through JNDI lookup, A container-managed entity manger requires the use of a JTA transaction.

An application-managed entity manager allows you to control the entity manager in application code. This entity manager is retrieved through the EntityManagerFactory API. An application managed entity manager can be either involved in the current JTA transaction (a JTA entity manager), or the transaction may be controlled through the EntityTransaction API (a resource-local entity manager). The resource-local entity manager transaction maps to a direct resource transaction (i. e. in Hibernate's case a JDBC transaction). The entity manager type (JTA or resource-local) is defined at configuration time, when setting up the entity manager factory.

An entity manager is the API to interact with the persistence context. Two common strategies can be used: binding the persistence context to the transaction boundaries, or keeping the persistence context available across several transactions.

The most common case is to bind the persistence context scope to the current transaction scope. This is only doable when JTA transactions are used: the persistence context is associated with the JTA transaction life cycle. When an entity manager is invoked, the persistence context is also opened, if there is no persistence context associated with the current JTA transaction. Otherwise, the associated persistence context is used. The persistence context ends when the JTA transaction completes. This means that during the JTA transaction, an application will be able to work on managed entities of the same persistence context. In other words, you don't have to pass the entity manager's persistence context across your managed beans (CDI) or EJBs method calls, but simply use dependency injection or lookup whenever you need an entity manager.

You can also use an extended persistence context. This can be combined with stateful session beans, if you use a container-managed entity manager: the persistence context is created when an entity manager is retrieved from dependency injection or JNDI lookup , and is kept until the container closes it after the completion of the Remove stateful session bean method. This is a perfect mechanism for implementing a "long" unit of work pattern. For example, if you have to deal with multiple user interaction cycles as a single unit of work (e.g. a wizard dialog that has to be fully completed), you usually model this as a unit of work from the point of view of the application user, and implement it using an extended persistence context. Please refer to the Hibernate reference manual or the book Hibernate In Action for more information about this pattern.

JBoss Seam 3 is built on top of CDI and has at it's core concept the notion of conversation and unit of work. For an application-managed entity manager the persistence context is created when the entity manager is created and kept until the entity manager is closed. In an extended persistence context, all modification operations (persist, merge, remove) executed outside a transaction are queued until the persistence context is attached to a transaction. The transaction typically occurs at the user process end, allowing the whole process to be committed or rollbacked. For application-managed entity manager only support the extended persistence context.

A resource-local entity manager or an entity manager created with EntityManagerFactory.createEntityManager() (application-managed) has a one-to-one relationship with a persistence context. In other situations persistence context propagation occurs.

In a transaction-scoped container managed entity manager (common case in a Java EE environment), the JTA transaction propagation is the same as the persistence context resource propagation. In other words, container-managed transaction-scoped entity managers retrieved within a given JTA transaction all share the same persistence context. In Hibernate terms, this means all managers share the same session.

Important: persistence context are never shared between different JTA transactions or between entity manager that do not came from the same entity manager factory. There are some noteworthy exceptions for context propagation when using extended persistence contexts:

In a Java SE environment only extended context application-managed entity managers are available. You can retrieve an entity manger using the EntityManagerFactory API. Only resource-local entity managers are available. In other words, JTA transactions and persistence context propagation are not supported in Java SE (you will have to propagate the persistence context yourself, e.g. using the thread local session pattern popular in the Hibernate community).

Extended context means that a persistence context is created when the entity manager is retrieved (using EntityManagerFactory.createEntityManager(...) ) and closed when the entity manager is closed. Many resource-local transaction share the same persistence context, in this case. 2351a5e196