http://forums.fedoraforum.org/showthread.php?p=1425227

Description of problem:

Since ever, i face the problem, that i cannot continue using my computer properly after i suspended it to ram and wake it up again.

    * Fedora 14, 64-bit, most recent and stable kernel
    * mainly KDE
    * Motherboard: Gigabyte P55A-UD4
    * Hard Drives
         1. SAMSUNG HD501LJ
         2. SAMSUNG SP1213N

I can figure out, that everything works fine, but with a severe delay.
Having a look at my led, signifying hard drive activity, it flases once a second for approx 10ms. frequency is very constant.


so i performed several checks:

firstly, hdparm -i, there is no difference before and after sleeping mode:
Code:

[root@bobbl-pc bobbl]# hdparm -i /dev/sda

/dev/sda:

 Model=SAMSUNG HD501LJ, FwRev=CR100-13, SerialNo=S0MUJDWQ560307
 Config={ Fixed }
 RawCHS=16383/16/63, TrkSize=34902, SectSize=554, ECCbytes=4
 BuffType=DualPortCache, BuffSize=16384kB, MaxMultSect=16, MultSect=off
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=976773168
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4 
 DMA modes:  mdma0 mdma1 mdma2 
 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 
 AdvancedPM=no WriteCache=enabled
 Drive conforms to: unknown:  ATA/ATAPI-3,4,5,6,7

 * signifies the current active mode

secondly, the drive speeds:

SATA-device:
Code:

[root@bobbl-pc bobbl]# hdparm -Tt /dev/sda

/dev/sda:
 Timing cached reads:   15220 MB in  2.00 seconds = 7621.57 MB/sec
 Timing buffered disk reads:  228 MB in  3.02 seconds =  75.52 MB/sec

after resuming:
Code:

[root@bobbl-pc bobbl]# hdparm -Tt /dev/sda

/dev/sda:
 Timing cached reads:     2 MB in  4.10 seconds = 499.54 kB/sec
 Timing buffered disk reads:    4 MB in  4.30 seconds = 952.62 kB/sec


IDE-device: (speed is equivalent, before suspending and after resuming)
Code:

[root@bobbl-pc bobbl]# hdparm -Tt /dev/sdb

/dev/sdb:
 Timing cached reads:   17582 MB in  2.00 seconds = 8806.94 MB/sec
 Timing buffered disk reads:  168 MB in  3.00 seconds =  55.93 MB/sec

kindly assist me in solving this problem!
thank you in anticipation! 

Version-Release number of selected component (if applicable):


How reproducible:
configuring a system with similiar hardware components, suspending system to RAM


Steps to Reproduce:
1.implied by description
  
Actual results:


Expected results:

-----------------------------------------------

Additional info:

[bobbl@bobbl-pc ~]$ lspci -nnk 
[...]
00:00.0 Host bridge [0600]: Intel Corporation Core Processor DMI [8086:d131] (rev 11)
        Subsystem: Giga-byte Technology Device [1458:5000]
[...]
00:1f.2 IDE interface [0101]: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA IDE Controller [8086:3b20] (rev 05)
        Subsystem: Giga-byte Technology Device [1458:b002]
        Kernel driver in use: ata_piix
        Kernel modules: ata_generic, pata_acpi
[...]
04:00.0 SATA controller [0106]: JMicron Technology Corp. JMB362/JMB363 Serial ATA Controller [197b:2363] (rev 03)
        Subsystem: Giga-byte Technology GA-EP45-DS5 Motherboard [1458:b000]
        Kernel driver in use: ahci
04:00.1 IDE interface [0101]: JMicron Technology Corp. JMB362/JMB363 Serial ATA Controller [197b:2363] (rev 03)
        Subsystem: Giga-byte Technology GA-EP45-DS5 Motherboard [1458:b000]
        Kernel driver in use: pata_jmicron
        Kernel modules: ata_generic, pata_acpi, pata_jmicron
05:00.0 IDE interface [0101]: Marvell Technology Group Ltd. Device [1b4b:91a3] (rev 11)
        Subsystem: Giga-byte Technology Device [1458:b000]
        Kernel modules: ata_generic, pata_acpi


if you have any open questions, i'd like to resolve them!