[Samsung Galaxy Mini] MisMisMis:
Ok, here are two dumps from the kernel logbuffer at debug level 7 (KERN_DEBUG). The first one from build 20130707 - working; and the second one from build 20130818 with the white screen issue. Both were obtained on a S6500XXLK2.

The logs are reduced to a period of time in which I toggled the screen.

The following is a wake up and suspend on build 20130707:

<6>[ 4251.494386] suspend: exit suspend, ret = 0 (2013-08-19 17:52:21.515608334 UTC)
<6>[ 4251.494404] active wake lock mmc_delayed_work
<6>[ 4251.494414] active wake lock PowerManagerService
<6>[ 4251.494422] suspend: abort suspend
<4>[ 4251.495679] [KeyLED] msm_keypad_bl_led_set: gpio124_value=1
<6>[ 4251.497342] request_suspend_state: wakeup (3->0) at 4251504401703 (2013-08-19 17:52:21.518548333 UTC)
<6>[ 4251.497387] late_resume: call handlers
<4>[ 4251.513362] msm_sdcc_setup_vreg : 2 : 1 : level : 1800
<6>[ 4251.523061] msm_fb_blank_sub panel_power_ON
<3>[ 4251.523261] lcdc_on:Trebon: set MDP LCDC pixel clock to 12288000
<7>[ 4251.523351] LCD start lcdc_trebon_panel_on
<7>[ 4251.533566] LCD start trebon_disp_powerup
<4>[ 4251.553102] msm_sdcc_setup_vreg : 2 : 1 : level : 1800
<4>[ 4251.555169] msm_sdcc_setup_vreg : 2 : 1 : level : 1800
<7>[ 4251.556227] mmc_attach_sd: Check app_op_cond(-123), ocr:0x 0
<4>[ 4251.556426] msm_sdcc_setup_vreg : 2 : 0 : level : 1800
<7>[ 4251.723449] LCD ldi mtpdata: 0 ff 0
<7>[ 4251.723472] LCD start trebon_disp_on
<7>[ 4251.723487] LCD HW rev is 3, apply 3's init sequence
<4>[ 4251.782469] msm_sdcc_setup_vreg : 2 : 1 : level : 1800
<4>[ 4251.793552] msm_sdcc_setup_vreg : 2 : 1 : level : 1800
<7>[ 4251.833075] mmc_attach_sd: retry Check app_op_cond(-123), ocr:0x 0
<4>[ 4251.833305] msm_sdcc_setup_vreg : 2 : 0 : level : 1800
<7>[ 4251.913030] LCD display on cmd : completed
<3>[ 4251.913098] ts_power_enable on
<6>[ 4251.913778] bma222_early_resume
<6>[ 4251.914740] hscd_early_resume
<6>[ 4251.915060] late_resume: done
<4>[ 4251.989853] [BACKLIGHT] : 21
<6>[ 4255.934141] [BATT] msm_batt_cb_func: RPC_ACCEPTSTAT_SUCCESS !!
<6>[ 4255.934228] [BATT] msm_batt_check_event: work !!
<6>[ 4255.941124] msm_batt_update_psy_status [BATTERY] Rev05 level : 76, voltage : 3945, temp_ap 210 temp_cp : 210, current_fg : -55 cur_cp :0 status 2battery_temp_adc
<6>[ 4255.941198] msm_batt_control_temperature [BATT] battery_temp : 210 temp_adc : 21
<6>[ 4255.941266] [BATT] msm_batt_update_psy_status: charger_status= 0, charger_type= 0,battery_status=0, battery_temp_adc=587,chg_current=-55, battery_temp=587, health 1status = 2
<4>[ 4256.551359] [KeyLED] msm_keypad_bl_led_set: gpio124_value=0
<3>[ 4266.335819] [TSP] 0 - P
<4>[ 4266.513269] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<3>[ 4266.513706] gpio_tlmm_config(0x00064581, GPIO_CFG_DISABLE) <sdc3_clk> failed: 0
<3>[ 4266.513722] pin 88 func 1 dir 1 pull 0 drvstr 3
<4>[ 4266.513747] msm_sdcc_setup_vreg : 3 : 0 : level : 1800
<4>[ 4266.513864] msm_sdcc_setup_vreg : 1 : 1 : level : 2850
<4>[ 4266.514124] msm_sdcc_setup_vreg : 1 : 0 : level : 2850
<4>[ 4266.873154] msm_sdcc_setup_vreg : 2 : 0 : level : 1800
<4>[ 4266.873213] msm_sdcc_setup_vreg : 2 : 0 : level : 1800
<3>[ 4267.126182] [TSP] 0 - R
<4>[ 4267.568469] [KeyLED] msm_keypad_bl_led_set: gpio124_value=1
<4>[ 4267.592779] msm_sdcc_setup_vreg : 3 : 0 : level : 1800
<4>[ 4267.594084] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4267.613235] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4267.653074] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4267.653154] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4267.656207] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4267.676305] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4267.680230] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4267.680385] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4267.681722] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<3>[ 4271.666468] [TSP] 0 - P
<3>[ 4271.733395] [TSP] 0 - R
<3>[ 4274.153963] [TSP] 0 - P
<3>[ 4274.587254] [TSP] 0 - R
<4>[ 4280.223726] [KeyLED] msm_keypad_bl_led_set: gpio124_value=0
<3>[ 4284.169947] [TSP] 0 - P
<3>[ 4284.270045] [TSP] 0 - R
<4>[ 4284.618608] [KeyLED] msm_keypad_bl_led_set: gpio124_value=1
<6>[ 4285.992980] [BATT] batt_timeover: timer !!
<6>[ 4285.993091] [BATT] msm_batt_check_event: work !!
<6>[ 4286.000060] msm_batt_update_psy_status [BATTERY] Rev05 level : 76, voltage : 3927, temp_ap 210 temp_cp : 210, current_fg : -96 cur_cp :0 status 2battery_temp_adc
<6>[ 4286.000131] msm_batt_control_temperature [BATT] battery_temp : 210 temp_adc : 21
<6>[ 4286.000200] [BATT] msm_batt_update_psy_status: charger_status= 0, charger_type= 0,battery_status=0, battery_temp_adc=587,chg_current=-96, battery_temp=587, health 1status = 2
<3>[ 4286.322393] [TSP] keyID : 2, touchstate : 128
<3>[ 4286.489659] [TSP] keyID : 2, touchstate : 0
<3>[ 4287.281652] [TSP] keyID : 2, touchstate : 128
<3>[ 4287.504825] [TSP] keyID : 2, touchstate : 0
<3>[ 4287.973366] [TSP] keyID : 2, touchstate : 128
<3>[ 4288.118283] [TSP] keyID : 2, touchstate : 0
<3>[ 4288.586754] [TSP] keyID : 2, touchstate : 128
<3>[ 4288.709424] [TSP] keyID : 2, touchstate : 0
<3>[ 4289.412438] [TSP] keyID : 2, touchstate : 128
<4>[ 4289.623690] [KeyLED] msm_keypad_bl_led_set: gpio124_value=0
<3>[ 4290.448624] [TSP] keyID : 2, touchstate : 0
<3>[ 4290.795453] [TSP] keyID : 2, touchstate : 128
<3>[ 4291.029897] [TSP] keyID : 2, touchstate : 0
<3>[ 4292.089992] [TSP] 0 - P
<3>[ 4292.212442] [TSP] 0 - R
<3>[ 4293.986609] [TSP] 0 - P
<3>[ 4294.498053] [TSP] 0 - R
<4>[ 4294.719352] [KeyLED] msm_keypad_bl_led_set: gpio124_value=1
<4>[ 4299.723666] [KeyLED] msm_keypad_bl_led_set: gpio124_value=0
<4>[ 4301.033057] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<3>[ 4301.033722] gpio_tlmm_config(0x00064581, GPIO_CFG_DISABLE) <sdc3_clk> failed: 0
<3>[ 4301.033772] pin 88 func 1 dir 1 pull 0 drvstr 3
<4>[ 4301.033843] msm_sdcc_setup_vreg : 3 : 0 : level : 1800
<3>[ 4304.684874] [TSP] 0 - P
<4>[ 4305.256030] msm_sdcc_setup_vreg : 3 : 0 : level : 1800
<4>[ 4305.256393] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4305.273036] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4305.312926] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4305.313005] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4305.316040] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4305.335995] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4305.339806] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4305.339945] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4305.341263] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<4>[ 4305.585474] [KeyLED] msm_keypad_bl_led_set: gpio124_value=1
<6>[ 4305.796532] [BATT] msm_batt_cb_func: RPC_ACCEPTSTAT_SUCCESS !!
<6>[ 4305.796594] [BATT] msm_batt_check_event: work !!
<6>[ 4305.802657] msm_batt_update_psy_status [BATTERY] Rev05 level : 76, voltage : 3942, temp_ap 210 temp_cp : 220, current_fg : -92 cur_cp :0 status 2battery_temp_adc
<6>[ 4305.802682] msm_batt_control_temperature [BATT] battery_temp : 220 temp_adc : 22
<6>[ 4305.802705] [BATT] msm_batt_update_psy_status: charger_status= 0, charger_type= 0,battery_status=0, battery_temp_adc=587,chg_current=-92, battery_temp=587, health 1status = 2
<3>[ 4306.658242] [TSP] 0 - R
<3>[ 4307.753341] [TSP] 0 - P
<3>[ 4307.952166] [TSP] 0 - R
<3>[ 4310.251563] [TSP] 0 - P
<3>[ 4310.540661] [TSP] 0 - R
<3>[ 4314.926573] [TSP] 0 - P
<3>[ 4315.393600] [TSP] 0 - R
<4>[ 4320.403652] [KeyLED] msm_keypad_bl_led_set: gpio124_value=0
<6>[ 4321.303496] report_hs_key 1
<6>[ 4321.470331] report_hs_key 0
<4>[ 4321.620964] [BACKLIGHT] : 0
<6>[ 4321.629533] request_suspend_state: sleep (0->3) at 4321636670010 (2013-08-19 17:53:31.650816640 UTC)
<6>[ 4321.629568] early_suspend: call handlers
<6>[ 4321.629578] hscd_early_suspend
<6>[ 4321.629893] bma222_early_suspend
<3>[ 4321.631403] release_all_fingers start.
<3>[ 4321.631418] ts_power_enable off
<4>[ 4321.717902] [VIB] OFF
<7>[ 4322.322953] LCD start lcdc_trebon_panel_off
<3>[ 4322.472978] config_lcdc_gpio_table: gpio_tlmm_config(0x41a0)=-5
<7>[ 4322.472998] LCD start trebon_disp_powerdown
<6>[ 4322.522886] msm_fb_blank_sub panel_power_OFF
<6>[ 4322.523038] PM: Syncing filesystems...
<6>[ 4322.523113] suspend: enter suspend, (2013-08-19 17:53:32.544418307 UTC)
<4>[ 4322.523143] Freezing user space processes ...
<6>[ 4322.533957] sync done.
<6>[ 4322.533986] PM: Syncing filesystems...
<6>[ 4322.534686] sync done.
<4>[ 4322.543051] (elapsed 0.01 seconds) done.
<4>[ 4322.543067] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
<4>[ 4322.563011] Suspending console(s) (use no_console_suspend to debug)
<6>[ 4322.563087] msm_batt_set_alarm[BATT] set alarm
<6>[ 4322.563111] msm_batt_suspend[BATT] set alarm for shor time
<6>[ 4322.566387] radio-tavaruatavarua_suspend: radio suspend
<6>[ 4322.566397]
<6>[ 4322.567287] msmrtc_suspend: wakeup alarm set to 2013-08-19 18:03:09 UTC
<4>[ 4322.567889] msm_sdcc_setup_vreg : 3 : 1 : level : 1800
<3>[ 4322.568307] gpio_tlmm_config(0x00064581, GPIO_CFG_DISABLE) <sdc3_clk> failed: 0
<3>[ 4322.568322] pin 88 func 1 dir 1 pull 0 drvstr 3
<4>[ 4322.568347] msm_sdcc_setup_vreg : 3 : 0 : level : 1800
<4>[ 4322.568481] [VIB] susepend
<4>[ 4322.568499] [KeyLED] msm_keypad_bl_led_set: gpio124_value=0
<4>[ 4322.568512] [KeyLED] msm_keypad_bl_led_set: gpio124_value=0
<4>[ 4322.568521] [KeyLED] msm_pmic_led_suspend
<6>[ 4322.568771] PM: suspend of devices complete after 5.019 msecs
<6>[ 4322.569101] power_suspend_late return 0
<6>[ 4322.569116] PM: late suspend of devices complete after 0.330 msecs
<6>[ 4322.569147] enabled clk 13: AHB_M_CLK,AHB_S_CLK,CSI0_CLK,CSI0_P_CLK,CSI0_VFE_CLK,CSI1_CLK,EBI1_CLK,EBI2_CLK,MDP_VSYNC_CLK,MDP_DSI_P_CLK,PBUS_CLK,PCM_CLK,ebi_acpu_clk
<6>[ 4322.569147] msm_pm_power_collapse(): idle 0, delay 18874725, limit 0
<6>[ 4322.569147] [vreg_suspend_stats] 14 enabled: VSW: 1, 2, 3, 4
<6>[ 4322.569147] [vreg_suspend_stats] LDO: 2, 3, 4, 7, 8, 9, 12, 14, 16, 18,
<6>[ 4322.569147] gpio_suspend: gpio-018-low, gpio-022-low, gpio-032-low, gpio-033-low, gpio-041-low,
<6>[ 4322.569147] gpio_suspend: gpio-058-low,
<6>[ 4322.569147] gpio_suspend: gpio-085-low,
<6>[ 4322.569147] gpio_suspend: gpio-096-low,
<6>[ 4322.569147] gpio_suspend: gpio-109-low, gpio-124-low, gpio-129-low,
<6>[ 4322.569147] SMEM_SMSM_SLEEP_DELAY: 1200165
<6>[ 4322.569147] SMEM_SMSM_LIMIT_SLEEP: 0
<6>[ 4322.569147] SMEM_SLEEP_POWER_COLLAPSE_DISABLED: 0
<6>[ 4322.569147] SMEM_SMSM_INT_INFO 2000000 0 0
<6>[ 4322.569147] msm_pm_power_collapse(): msm_pm_collapse returned 1
<6>[ 4322.569147] msm_irq_exit_sleep1 2000000 0 0 now 0 0
<6>[ 4322.569147] SMEM_SMSM_SLEEP_DELAY: 1200165
<6>[ 4322.569147] SMEM_SMSM_LIMIT_SLEEP: 0
<6>[ 4322.569147] SMEM_SLEEP_POWER_COLLAPSE_DISABLED: 0
<6>[ 4322.569147] SMEM_SMSM_INT_INFO 2000000 0 1
<6>[ 4322.569196] wakeup wake lock: rpcrotuer_smd_xprt
<6>[ 4322.569431] report_hs_key 1

The following is a suspend and resume on build 20130818:

7>[ 872.979659] [KeyLED] msm_keypad_bl_led_set: gpio124_value=0
<7>[ 872.980431] [BACKLIGHT] : 0
<6>[ 872.994338] request_suspend_state: sleep (0->3) at 872998271336 (2013-08-19 19:22:05.494571336 UTC)
<6>[ 872.994428] hscd_early_suspend
<6>[ 872.994718] bma222_early_suspend
<3>[ 872.996243] release_all_fingers start.
<3>[ 872.996263] ts_power_enable off
<7>[ 873.156138] LCD start lcdc_trebon_panel_off
<3>[ 873.306216] config_lcdc_gpio_table: gpio_tlmm_config(0x41a0)=-5
<7>[ 873.306236] LCD start trebon_disp_powerdown
<7>[ 873.306303] [LCDC_JENA] About to turn off
<7>[ 873.306313] [LCDC_JENA] Disabling regulator
<6>[ 876.483286] report_hs_key 1
<7>[ 876.489954] [KeyLED] msm_keypad_bl_led_set: gpio124_value=1
<6>[ 876.510444] request_suspend_state: wakeup (3->0) at 876514329667 (2013-08-19 19:22:09.010621334 UTC)
<7>[ 876.536931] LCD start lcdc_trebon_panel_on
<6>[ 876.546786] report_hs_key 0
<7>[ 876.547519] LCD start trebon_disp_powerup
<7>[ 876.547578] [LCDC_JENA] About to turn on
<7>[ 876.547608] [LCDC_JENA] Enable regulator
<7>[ 876.736776] LCD ldi mtpdata: 0 ff 0
<7>[ 876.736823] LCD start trebon_disp_on
<7>[ 876.736858] LCD HW rev is 3, apply 3's init sequence
<7>[ 876.926193] LCD display on cmd : completed
<3>[ 876.926311] ts_power_enable on
<6>[ 876.927293] bma222_early_resume
<6>[ 876.928718] hscd_early_resume
<7>[ 877.256141] [LCDC_JENA] Sleeping for 200ms
<7>[ 877.256154] [BACKLIGHT] : 21
<6>[ 877.586688] report_hs_key 1
<6>[ 877.624148] report_hs_key 0
<7>[ 877.753831] [BACKLIGHT] : 0
<7>[ 877.759313] [KeyLED] msm_keypad_bl_led_set: gpio124_value=0
<6>[ 877.760958] request_suspend_state: sleep (0->3) at 877764921333 (2013-08-19 19:22:10.261228000 UTC)
<6>[ 877.761001] hscd_early_suspend
<6>[ 877.761278] bma222_early_suspend
<3>[ 877.762721] release_all_fingers start.
<3>[ 877.762736] ts_power_enable off
<6>[ 877.811008] report_hs_key 1
<7>[ 877.812471] [KeyLED] msm_keypad_bl_led_set: gpio124_value=1
<6>[ 877.846443] report_hs_key 0
<6>[ 877.871043] request_suspend_state: wakeup (3->0) at 877874999666 (2013-08-19 19:22:10.371303000 UTC)
<7>[ 877.896274] LCD start lcdc_trebon_panel_off
<3>[ 878.046211] config_lcdc_gpio_table: gpio_tlmm_config(0x41a0)=-5
<7>[ 878.046229] LCD start trebon_disp_powerdown
<7>[ 878.046296] [LCDC_JENA] About to turn off
<7>[ 878.046306] [LCDC_JENA] Disabling regulator
<7>[ 878.126353] LCD start lcdc_trebon_panel_on
<7>[ 878.136578] LCD start trebon_disp_powerup
<7>[ 878.136613] [LCDC_JENA] About to turn on
<7>[ 878.136623] [LCDC_JENA] Enable regulator
<7>[ 878.326503] LCD ldi mtpdata: 0 ff 0
<7>[ 878.326524] LCD start trebon_disp_on
<7>[ 878.326536] LCD HW rev is 3, apply 3's init sequence
<7>[ 878.516161] LCD display on cmd : completed
<3>[ 878.516976] ts_power_enable on
<6>[ 878.517641] bma222_early_resume
<6>[ 878.518434] hscd_early_resume
<7>[ 878.836126] [LCDC_JENA] Sleeping for 200ms
<7>[ 878.836139] [BACKLIGHT] : 21
<6>[ 879.112701] report_hs_key 1
<6>[ 879.153221] report_hs_key 0

I would have posted it in the devel thread but I lack a sufficient post count - and it seems to me the discussion here is more focused anyway... :p