Lose wireless when computer hibernates

My old HP laptop with Slackware64 14.2 started to hibernate. I don't normally let that happen, because when it hibernates, I lose wireless. The wireless logo in the desktop gets a red X over it and when I right-click on it to get to some kind of menu for network options, there isn't much in the menu that looks like it will help. There are numerous Connection Details in Network Management Settings window that opens, but nothing that says anything like "On" or "Restart". In the terminal, I use Code:iwconfig and it says

Quote:

lo no wireless extensions wlan0 IEEE 802.11bgn ESSID:off/any Mode:Managed AccessPoint: Not-associated Tx-Power=off Retry short limit:7 RTS thr:off Fragment thr: off Power Management: off eth0 no wireless extensions

I tried
Code:sudo iwconfig wlan0 upand it responded
Quote:

iwconfig: unknown command "up"

I also tried
Code:sudo iwconfig wlan0 power onQuote:

Errors for wireless requests "Set Power Management" (8B2c): SET failed on device wlan0 ; Operation not permitted

The only way I know to get wireless back on is to completely restart. Is there something else I can do that doesn't involve a reboot?

EDIT-- Actually, I restarted the computer twice and neither time had wireless. When I hover over the icon with my mouse, it says Wireless Disabled. I don't know how I did that.